Suppose that a snake handler bitten by a particular venomous snake species was treated with antivenin. Why might the same treatment for a second such bite have different results?

Answers

Answer 1

A strong immunological reaction could be brought on by a subsequent injection if the handler built up immunity to the antivenin's protein components. Additionally, the immune system of the handler may now generate antibodies that could counteract the venom.

What exactly are antibodies?

When your body comes into contact with an undesirable chemical, antibodies, proteins, protect you. Your immune system produces antibodies that bind to these foreign substances and expel them from your body. An alternative name for an antibody is immunoglobulin.

What types of antibodies are there?

The constant area and activity of the various kinds of antibodies vary. For instance, IgA is located in the mucous membranes lining the respiratory and gastrointestinal systems, whereas IgG, the most prevalent antibody, is primarily present in the blood and tissue fluids.

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Related Questions

How can an enzyme cofactor needed for a process that is vital to all animals be an essential nutrient (vitamin) for only some?

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All creatures need the cofactor, so those that don't need it in their food must be able to make it from other organic molecules.

What is cofactor?A cofactor is a chemical or metallic ion that is not a protein and is necessary for the catalytic function of an enzyme (a catalyst is a substance that increases the rate of a chemical reaction). Cofactors are characterized as "helper molecules" that speed up biological processes. Enzyme kinetics is a field of study that focuses on characterizing the rates at which things occur. In contrast to ligands, cofactors frequently derive their function from staying bound. Inorganic ions and sophisticated organic compounds known as coenzymes are the two main categories of cofactors. In modest levels, coenzymes are mostly derived from organic vitamins and other vital elements.

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20pts i need this for an essay.

Think about the role of both biotic and abiotic factors within an ecosystem.


Describe a scenario in which one abiotic or biotic factor is added or removed from an ecosystem.


Explain the possible side effects on that ecosystem.





Be sure to –Address the prompt, provide support, and conclude your thoughts.

Answers

Answer:One abiotic factor that could have a side affect on the ecosystem is air.One biotic factor that would have side effect on the ecosystem would be plants.

Explanation:

this biome contains plants that are adapted to prevent water loss due to the low average rainfall and high temperatures year-round. savanna savanna boreal forest boreal forest tropical rain forest tropical rain forest desert

Answers

The biome that contains plants that are adapted to prevent water loss due to the low average rainfall and high temperatures year-round is desert (option D).

What is a desert?

A desert is a barren area of land or desolate terrain, especially one with little water or vegetation.

A desert is characterized by the relatively low amount of rainfall and intense temperature per year, hence, there is little growth of plant life.

The few plants that are adapted to survive in the desert or arid region are specially equiped to do do. Some of the structural adaptations to desert conditions by plants are as follows:

Waxy cuticleReduction of leaves to spines Deep tap roots

Therefore, the biome that contains plants that are adapted to prevent water loss due to the low average rainfall and high temperatures year-round is desert.

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What does a human being , plants, mushrooms and fish have about them that makes them different

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Answer:

biological differences such as, different appearances, and different functions. mushrooms are a fungi and they break down/decompose dead plants and such. fish eat algae and other fish. and humans eat plants, and animals. we all do different things. think about it can a mushroom walk, can a fish walk? humans breath air, mushrooms make air, and fish breath oxygenated H2O

Which layers of a vessel contains collagen fibers with scattered bands of elastic fibers?

Answers

Tunica externa are the layers of a vessel containing collagen fibers with scattered bands of elastic fibers.

Every artery and vein has three layers. The tunica intima is the innermost layer. The tunica medium is the muscular middle layer, while the tunica adventitia is the outermost layer. Capillaries have no tunica intima since they are only one cell layer thick.

The tunica externa, also known as the tunica adventitia, is the blood vessel's outermost tunica (layer) that surrounds the tunica medium. It is mostly made of collagen and is supported by an exterior elastic lamina in arteries.

Except for the major arteries, it is the thickest layer. The tunica externa is mostly a connective tissue layer, however it does contain some smooth muscle in veins. Vasoconstriction and vasodilation in vessel walls can have a significant impact on blood flow.

Below is the histological microscopic slide view of Tunica externa.

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After surgical removal of an infected gallbladder, a person must be especially careful to restrict dietary intake of a. starch. b. protein. c. sugar. d. fat.

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d. fat  The removal of the gall bladder will have an influence on the generation of bile, which will affect fat digestion because bile is essential for breaking down large fat molecules and commencing digestion.

What are the risks of having one's gallbladder removed?

Leakage of bile

However, once the gallbladder is removed, bile fluid may occasionally flow into the belly (abdomen). Belly ache, feeling nauseous, a fever, and a distended tummy are all symptoms of a bile leak.

After gallbladder surgery, eating the incorrect foods can cause discomfort, bloating, and diarrhoea. To avoid stomach discomfort, avoid high-fat or spicy meals such as French fries and potato chips. Meats high in fat, such as bologna, sausage, and ground beef

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5.if a farmer sprays a pesticide onto a field and kills half of the insect pests, he has caused a reduction in________.

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If a farmer sprays a pesticide onto a field and kills half of the insect pests, he has caused a reduction in population size.

The number of organisms of a particular species in an area is referred to as the population size. Each species of organism present in an area will have a different population size.

A species that has better traits to adapt to an ecosystem will have a greater population size.

A pesticide is a substance that is used to kill pests. Farmers use pesticides in their fields to protect crops from pests such as insects.

If a farmer sprays a pesticide that reduces the insect pest population to half, then this means that the population size of the insect pest has reduced.

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Systems biology is mainly an attempt to a. analyze genomes from different species. b. simplify complex problems by reducing the system into smaller, less complex units. c. understand the behavior of entire biological systems by studying interactions among its component parts. d. build high-throughput machines for the rapid acquisition of biological data.

Answers

Systems biology is mainly an attempt to:

a. analyze genomes from different species.

b. simplify complex problems by reducing the system into smaller, less complex units.

c. understand the behavior of entire biological systems by studying interactions among its component parts.

d. build high-throughput machines for the rapid acquisition of biological data.

Option c) is the correct option.

What do you understand by Systems biology?

Systems biology is responsible for some of the most important developments in the science of human health and environmental sustainability. It is a holistic approach to deciphering the complexity of biological systems, based on the understanding that the networks that make up the whole of living organisms are more than the sum of their parts. It collaborates, integrating many scientific disciplines—biology, computer science, engineering, bioinformatics, physics, and more—to predict how these systems change over time and under different conditions, and to develop solutions to the world's most pressing health and environmental problems.

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If an enzyme is inhibited by a substance that binds away from the active site this substance must be?

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If an enzyme is inhibited by a substance that binds away from the active site this substance must be an allosteric inhibitor.

What is an allosteric inhibitor?

An inhibitor is a substance that prevents an enzyme from acting. The inhibitor may or may not bind to the active site of the enzyme. Hence not all the inhibitors binds to the active site.

If an enzyme is inhibited by a substance that binds away from the active site this substance must be an allosteric inhibitor.

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What does an ecosystem contain that a community does not?
OA. Biotic factors
OB. Multiple species
OC. Abiotic factors
OD. Multiple organisms
SUBMIT

Answers

The answer is B hope this helps

An ecosystem includes both biotic (living) and abiotic (non-living) factors such as water, air, soil, temperature, and sunlight, whereas a community refers only to the multiple species of living organisms in a particular area. The correct option is C.

What is an ecosystem?

An ecosystem is a region where a bubble of life is created by plants, animals, and other organisms interacting with the weather, environment, and other factors. Abiotic variables, or nonliving components, coexist with biotic components in ecosystems. Plants, animals, and other species are biotic factors.

An ecosystem contains abiotic factors that a community does not. An ecosystem includes both biotic factors (living organisms like plants, animals, and microorganisms) and abiotic factors (non-living elements like temperature, water, sunlight, and soil).

In contrast, a community only consists of the various interacting species (biotic factors) within a specific area, without considering abiotic factors.

Therefore, the correct option is C.

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Which body membrane protects the body from water loss and harm to internal organs?.

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The body membrane that protects the body from water loss and harm to internal organs is called cutaneous membrane.

What is cutaneous membrane?

Cutaneous is a term relating to, existing on, or affecting the exterior skin, especially the cutis.

The cutaneous membrane is the technical term for our skin whose primary role is to help protect the rest of the body's tissues and organs from physical damage such as abrasions, chemical and biological damage.

The skin or cutaneous membrane is the outer protective layer of the body of any animal, including of a human.

Therefore, the body membrane that protects the body from water loss and harm to internal organs is called cutaneous membrane.

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Reactions that use energy to drive the synthesis of molecules inside the cell are most specifically considered.

Answers

Answer:

Anabolic

Explanation: easy question just study please

is area a statistical test

Answers

Answer:

A statistical hypothesis test is a method of statistical inference used to decide whether the data at hand sufficiently support a particular hypothesis.

Explanation:

What are the different aspects of statistical testing?

The null hypothesis test determines if the data’s values fall outside the range predicted through the null hypothesis. In this article, we will discuss the different aspects of statistical tests, including the selection of parametric and nonparametric tests to understand the statistical testing in detail.

How do you interpret statistical test statistics?

Interpreting test statistics For any combination of sample sizes and number of predictor variables, a statistical test will produce a predicted distribution for the test statistic. This shows the most likely range of values that will occur if your data follows the null hypothesis of the statistical test.

What is the p-value of a statistical test?

Statistical tests work by calculating a test statistic – a number that describes how much the relationship between variables in your test differs from the null hypothesis of no relationship. It then calculates a p-value (probability value).

What are the assumptions when selecting a statistical test for data?

Before selecting a statistical test for the collected data, it is important to meet certain assumptions and understand the types of variables used in the study. The first assumption about the data is that the observations or variables included in the data are not related.

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community Guidelines https://brainly.com/community-guidelines #BT1101 ...

Which of the following is not an accurate statement? a. Hormones are chemical messengers that travel to target cells through the circulatory system. b. Hormones often regulate homeostasis through antagonistic functions. c. Hormones of the same chemical class usually have the same function. d. Hormones are often regulated through feedback loops.

Answers

The following is not an accurate statement

c. Hormones of the same chemical class usually have the same function.

Usually, the function of hormones belonging to the same chemical class is the same.

Chemicals called hormones function as messenger molecules that travel through the bloodstream. From the glands where they are created to cells in various regions of the human body, hormones convey chemical information. The cellular mechanisms that regulate stress, appetite, growth, sleep cycles, blood sugar can be turned on or off by these chemical messengers.

Hormones play a crucial role in the body's ability to operate properly. They regulate how the organs work and have an impact on their development, sexuality, and reproduction.

In addition, hormones have an impact on how the body consumes and stores energy as well as controls fluid balance and blood sugar and salt levels.

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Which of the following best describes the logic of scientific inquiry? a. If I generate a testable hypothesis, tests and observations will support it. b. If my prediction is correct, it will lead to a testable hypothesis. c. If my observations are accurate, they will support my hypothesis. d. If my hypothesis is correct, I can expect certain test results.

Answers

If my hypothesis is correct, I can expect certain test results. It describes the best logic of scientific enquiry.

What best represents the methodology of scientific research?

The six steps of the scientific method are as follows: 1) asking a question about what you see, 2) doing background research to find out what is known about the subject, 3) formulating a hypothesis, 4) conducting experiments to test the hypothesis, 5) analyzing the results of the experiment, and 6) coming to conclusions.

There is an example of scientific enquiry that is to determine how four fertilizer affect the growth rate of bean plants. So, the option d will be correct.

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What do many of the regulators of complement activation (rcas) that ensure c3b is deposited on the surface of pathogens and not on the surfaces of healthy host cells and tissues contain?

Answers

The regulators of complement activation is Complement control protein (CCP) modules

This is further explained below.

What are tissues?

Generally, A collection of cells that have a similar structure and work together to perform a certain job is called a tissue.

The gaps in between the cells are filled with an inorganic substance that is referred to as the intercellular matrix. It's possible that certain tissues have a lot of this, while others have very little.

a live cell that has been invaded by an infectious agent or is capable of being invaded by such an agent

The pathogen, in the original and largest use of the word, refers to any organism or agent that might cause illness.

The CCP modules responsible for this are part of the immune system. In addition to "germ," "infectious agent," and "pathogen" are all terms that may be used to describe the same thing.

In the 1880s, researchers studying the complement system coined the word "pathogen."

In conclusion, The complement system is activated by certain components of complement control protein (CCP).

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Based on the tree below, which statement is not correct? a. The salamander lineage is a basal taxon. b. Salamanders are a sister group to the group containing lizards, goats, and humans. c. Salamanders are as closely related to goats as to humans. d. Lizards are more closely related to salamanders than to humans.

Answers

The statement that is not correct is that lizards are more closely related to salamanders than to humans.

What are lizards?

Lizards belong to the group of reptiles that belongs to the animal kingdom that share an ancestor with snakes. They are animals that have a long body and skin covered with lamellae like scales. Among the lizards we know are iguanas, chameleons, lizards, and geckos.

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Based on the tree below, which statement is not correct?

a. The salamander lineage is a basal taxon.

b. Salamanders are a sister group to the group containing lizards, goats, and humans.

c. Salamanders are as closely related to goats as to humans.

d. Lizards are more closely related to salamanders than to humans

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Nadh and fadh2 carry high energy electrons from the other stages of respiration to the electron transport chain. What does the electron transport chain use these electrons to do?.

Answers

Some of the energy of the high-energy electrons is captured as they travel along the chains. This energy is used to move hydrogen ions  (from NADH and FADH2) from the matrix into the intermembranous region through the inner membrane.

The last phase of aerobic respiration is electron transport. In this phase, energy from the Krebs cycle products NADH and FADH2 is converted to ATP.

NADH and FADH2 release high-energy electrons that travel through electron transport chains similar to those utilized during photosynthesis. The electron transport chains are located on the inner membrane of the mitochondrion. Some of the energy of the high-energy electrons is captured as they travel along the chains. Hydrogen ions (from NADH and FADH2) are pumped over the inner membrane and into the intermembrane space using this energy.

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When a hospital-physician relationship is established, a physician becomes part of the medical staff based on what criteria?

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A physician becomes part of the medical staff based on the successful completion of a prescribed credentialing process.

A physician, also known as a medical practitioner, medical doctor, or simply a doctor, is a person who works in the medical field. When a hospital-physician relationship is established, a physician becomes part of the medical staff.

Medicine is the study, diagnosis, prognosis, and treatment of illness, injury, and other physical and mental impairments to promote maintain, or restore health. In general practice, doctors take on the role of providing ongoing and comprehensive medical care to people, families, and communities, while focusing their practice on certain disease categories, patient types, and treatment modalities (known as specialties).

To practice medicine effectively, one must have a thorough understanding of the academic fields, such as anatomy and physiology, underlying disorders, and how to treat them—the science of medicine—as well as a respectable level of proficiency in the art or craft of medicine.

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In Figure 2.7 , if two or more elements are in the same row, what do they have in common? If two or more elements are in the same column, what do they have in common?

Answers

The elements in a row all have the same number of electron shells and in same coloumn they have same number of electrons in the outer orbital

What qualities do the members of a group share? Why?

Because they all have the same amount of electrons in their outermost shell, or the face they present to the outside world, a set of elements frequently looks and behaves similarly. For instance, the group 18 elements, which are located on the extreme right side of the table, have entirely full outer shells and are infrequently involved in chemical reactions.

So, in same coloumn they have same number of electrons in their valence shell and in same row they have same number of atomic Orbitals.

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What would happen if all of the hemoglobin contained within the rbcs became free in the plasma?

Answers

If all of the hemoglobin contained within the RBCs became free in the plasma, it would significantly increase blood osmolarity; option D.

What is osmolarity of a solution?

The osmolarity of a solution is a measure of the number of particles present in a given volume of solution.

Osmolarity is a measure of the concentration of particles in a given solution.

An increase in dissolved particles will raise the osmolarity of a solution.

In the cell, proteins, ions, and carbohydrates contributes to the osmolarity of the cell.

Hemoglobin is a protein which is found within the red blood and whose function is to transport oxygen in the body.

Therefore, if all of the hemoglobin contained within the RBCs became free in the plasma, the osmolarity of plasm will increase.

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Note that the complete question is given below:

What would happen if all of the hemoglobin contained within the RBCs became free in the plasma?

a)It would considerably increase blood oxygen carrying capacity.

b)It would facilitate delivery of oxygen into tissues supplied by small capillaries.

c)It would facilitate oxygen diffusion into cells distant from blood capillaries.

d)It would significantly increase blood osmolarity.

e)It would drastically increase osmotic colloid pressure.

A substance that is recognized as foreign or nonself is? 1. immunoglobulins. 2. lymphocytes 3. antibodies. 4. antigens

Answers

A substance that is recognized as foreign or non-self is antigens; option 4

What is the immune system?

The immune system is a system in the body whose primary function is to defend the body against attack or invasion from foreign agents which are more likely than not to cause diseases.

In some instances though, some foreign agents recognized by the body may not be disease-causing agents.

The components of the immune system include the following:

immunoglobulinslymphocytesantibodies

Antibodies are proteins that protect you when foreign agents enters your body. Antibodies usually bind to antigens which are foreign substances.

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you are estimating the time since the divergence of two species and used hemoglobin for your molecular clock. you would like to get independent support for your estimate. if you also use cytochrome c, which result do you expect?

Answers

The number of amino acid differences between the two species will be fewer for cytochrome c than for hemoglobin.

What can be utilized as a molecular clock to estimate the time since organisms diverged from a familiar?

A molecular watch uses DNA sequences (or the amino acid sequence of proteins that DNA encodes) to calculate how long it has been since related species separated from a common ancestor

Why does hereditary drift have more of an impact on the evolution of small peoples than large ones?

Small populations tend to lose hereditary diversity more quickly than large populations due to stochastic sample error (i.e., genetic drift). This is because some interpretations of a gene can be lost due to accidental chance, and this is more likely to occur when residents are small.

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Complete Question is,

a) The number of amino acid differences between the two species will be the same for both genes.

b) The number of amino acid differences between the two species will be fewer for hemoglobin than for cytochrome c.

c) The number of amino acid differences between the two species will be fewer for cytochrome c than for hemoglobin.

Plants use statoliths to detect gravity (see Figure 39.22). How do plants and animals differ with regard to the type of compartment in which statoliths are found and the physiological mechanism for detecting their response to gravity?

Answers

In animals, detection is done by mechanoreceptors on hair cells. In plants, this mechanism seems to involve calcium signaling.

Briefing:

In animals, the statoliths are extracellular. In contrast, the statoliths of plants are found in an intracellular organelle. Their location detection methods are also different. In animals, detection is done by mechanoreceptors on hair cells. In plants, this mechanism seems to involve calcium signaling.

What is the statoliths in plants?

A group of membrane-bound starch granules (see amyloplast) in plant cells is thought to act as a gravity sensor. Starch stators are found in root tip cells and tissues near the vascular bundle of shoots; Under the action of gravity, they sink to the bottom of the cell.

What is the function of statoliths?

The statoliths are thought to regulate the transport of the growth hormone, auxin, by acting on specific auxin transporters, the PIN proteins.

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On average, all cells are approximately the same size whether they are found in elephants or beetles. what is the best explanation for why cells are so small?

Answers

The best explanation for why cells are so small in all organisms regardless of the taxonomic group is that this size optimizes homeostasis by the exchange of nutrients and waste products with the media.

Why cells are so small?

The cells are so small in all organisms regardless of the species because they need to optimize the exchange of material with the surrounding environment, which allot to maintain the state of internal equilibrium.

In conclusion, the best explanation for why cells are so small in all organisms regardless of the taxonomic group is that this size optimizes homeostasis by the exchange of nutrients and waste products with the media.

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Some disease-causing microbes attack the body by turning on or off specific signal transduction pathways. In the disease cholera, the bacterium vibrio cholerae causes massive diarrhea by interfering with such a pathway. A toxin from this bacterium enters intestinal cells and chemically modifies g proteins. Once modified, the g proteins can no longer cleave gtp into gdp. What would you expect to see within the intestinal cells of a person with cholera?.

Answers

The G proteins in the interstitial cells of a person with cholera remain activated and continually activate adenyl cyclase.

Signal transduction pathways allow binding of extracellular signalling molecules (like epinephrine) to the cells to respond to environmental signals of any stress like attach of a pathogen. The adrenal glands release a hormone called epinephrine in response to the disease-causing microbes. These hormones attach to the receptors on the cell surface and promote a response. The disease causing microbes turn this pathway on to respond to the attack.

Vibrio cholerae is a gram-negative bacteria that causes cholera in humans. It affects the interstitial cells of the small intestine by producing a toxin called choleragen. Choleragen attaches to the cell membrane and traps the G-protein in its active state. Active G-protein activates adenyl cyclase that stimulates the production of cyclic AMP molecules. cAMP activates protein kinase A (PKA) that activates chloride-ion channels and blocks sodium-hydrogen antiporters. This results in the loss of sodium chloride and water into the lumen and causes watery diarrhea.

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The medicinal use of foxglove to make the drug digoxin (lanoxin) is an example of a modern drug derived from ________. a. an animal b. a mineral c. a plant d. a trace element

Answers

The medicinal use of foxglove to make the drug digoxin (lanoxin) is an example of a modern drug derived from a plant and is denoted as option C.

What is Foxglove?

This refers to a herbaceous perennial plants which has tubular blooms comprising of different colors and are important due to its health benefits in the body.

This plant is used in the production of drugs such as digoxin which is very effective in the treatment of different types of heart diseases. Since foxgloves have features such as root, flowers etc then it is a plant and is the reason why it was chosen as the correct choice.

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Why can only some patients with diabetes insipidus be treated effectively with ADH?

Answers

A patient with untreated diabetes insipidus has hyposecretion of ADH due to damage to person's hypothalamus or pituitary gland.

What is hyposecretion?

An endocrine gland's hyposecretion is frequently brought on by the death of its hormone-secreting cells. As a result, insufficient amounts of the hormone are released. Type 1 diabetes is an illustration of this, in which insulin-secreting pancreatic cells are attacked and destroyed by the body's immune system. Insulin injections are typically used to treat this kind of diabetes.

Why is ADH only beneficial for some patients with diabetic insipidus?

As ADH is produced by the brain's hypothalamus and kept in the posterior pituitary gland. The amount of water is constantly balanced and regulated by ADH. When ADH is disrupted, the kidneys eliminate too much fluid from the body, increasing urine output and urination. Blood sugar levels in diabetes insipidus are normal.

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What are chemical messengers that diffuse through tissue fluid and affect only nearby cells called?

Answers

Chemical messengers that diffuse through tissue fluid and affect only nearby cells are called paracrine.

In the field of science, paracrine can be described as cell signaling molecules that are produced in a cell and affect the nearby cells without having the requirement to be transported through the blood.

As paracrine travel through tissue fluids hence it can induce changes in nearby cells only, unlike the hormones, which travel long distances through the blood. Hence, paracrine is involved in the creation of local action. There are certain receptors and pathway system that is followed by the paracrine in order to cause a reaction in the nearby cells.

Examples of paracrine chemical messengers include growth factors or clotting factors.

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Hodgkin and huxley proposed that sodium was the predominant ion associated with the firing of an action potential because?

Answers

Hodgkin and huxley proposed that sodium was the predominant ion associated with the firing of an action potential because the membrane potential approaches the Na+ Nernst potential during the rising phase.

In 1952, Hodgkin and Huxley proposed that sodium was the predominant ion associated with the firing of an action potential. This was based on their observation that the membrane potential approaches the Na+ Nernst potential during the rising phase of the action potential.

Since then, many studies have confirmed that Hodgkin and Huxley were correct in their proposal. Sodium ions play a vital role in the firing of action potentials and are responsible for the fast depolarization phase of the action potential.

Without sodium ions, action potentials would not be able to propagate along axons and nerves would not be able to transmit signals. This discovery has helped to further our understanding of how the nervous system works and has laid the foundation for subsequent research in this field.

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Other Questions
I (learn) for school everyday Sam says that both 0.0032 and 0.0302 have 2 significant digitsbecause zeros are not significant. Do you agree? Members of a baseball team raised $1128.75 to go to a tournament. They rented a busfor $856.50 and budgeted $24.75 per player for meals. Write and solve an equationwhich can be used to determine x, the number of players the team can bring to thetournament.Equation: inaccurate can lead to excess and/or shortages throughout the organization and the supply chain. What does density show? Explain. how did the choice of the earliest civilizations to settle near waterways affect their civilizations? Who advocated the early attempt to develop an international trade theory in response to the practice of mercantilism? Consider a sample of gas that contains 775 moles of smokestack gas. how many molecules of so2 are contained in this sample? 2.04 x 10 12 can you solve this for me A contaminat is found in solution at a level of 3/500%. What fraction of the solution isnthis? the inverse demand function of a group of consumers for a given type of widgets is given by the following expression: the is the president's principal forum for considering national security policy matters with his senior national security advisors and cabinet officials. please refer to the image First StepsTHE LANDINGAs the lander hit, Maria drew a jagged breath, and her chest muscles clenched tight with anxiety. Captain Curran, the group leader, turned around and smiled at Maria and her five friends. All right, he said with forced joviality. Who wants to be the first of the generations born in space to set foot on a real planet?Maria waited for someone else to speak or raise their hand. Next to her, Allen just stared at the floor of the lander muttering, Not me, not me.She glanced at Lily, who Maria had always known to be fearless, but Lily bit her lip and turned away. Javier looked positively gray, and the twins buried their faces in their hands. Someone would have to be first. Maria closed her eyes and took a few meditative breaths, waiting for someone else to volunteer, but the lander was silent. FINDING COURAGEThe radio crackled to life. Lander one, this is Mothership, do you copy?Yes, Captain Curran answered. Weve landed safely and are waiting to exit the lander, but theres just a littledisagreementover which pioneer wants to be the first to set foot on our new home.Tell them theres plenty for everyone to see, and theyre going to love it out there, the voice on the radio responded. I wish it were me instead of you; I miss the feel of real air on my face.Captain Curran flipped off the microphone. You six have lived your entire lives in space, and its a great privilege to be the first of your generation to see a new planet. The others are watching; if youre afraid, theyll be afraid. Cant any of you find the courage to set an example?Maria shifted uncomfortably in her seat and thought of her parents; they had traveled across the galaxy to find their family a new home, with clean air and good soil, and she knew this planet was for them. Ill do it, Captain, she mumbled as she slipped out of her harness and rose out of her seat. Maria couldnt shake the feeling of trepidation as she stood and watched the doors of the lander slide open.A NEW WORLDA burst of air hit Maria in the face. She scrunched up her nose as an unfamiliar assortment of odors hit her nostrils. Some smelled sweet, some disgusting, and some were just strange. There were never strange smells on the ship; everything was always the same there. What was it going to be like to live where things changed? The rest of the children gathered around the opening as she climbed down the ladder, and Maria tried to smile as she met their worried eyes. Then, suddenly, something crunched underneath her boots; she was standing on the surface of the planet, and it felt nothing like the smooth metallic halls that shed known all her life.Without letting go of the ladder, she turned around to look at the world around the lander. The soil was full of shapes and textures; there were some small, grainy pieces, then larger clumps that she could break with the toe of her boot. One piece was hard and smooth, and she let go of the ladder to pick it up. Captain, she called, I think Ive found a rock!The air was moving, and long, thin, green things bowed and danced. Grasses, Maria whispered to herself, remembering the videos in her science lessons. She let go of the ladder and took soft, slow steps and realized her arms and legs felt like they were full of lead. Natural gravity, she whispered to herself. She started to walk a little more quickly, getting used to the new sensation. She was doing what others had previously thought impossibletaking steps on a new world.A creature with gossamer wings landed on her nose, and she crossed her eyes trying to get a good look at it. Something small and furry scurried across her feet as she spun in a slow circle. Inspired, she ran as fast as she could across the foreign soil; shed never seen somewhere so big, and it was thrilling. Suddenly, a deep, low sound echoed around her. Thats the call of a hornbeast, Captain Curran shouted from the bottom of the ladder. Maria glanced back and saw that he was helping her friends take tentative first steps in the new world. Walk to your left a little, and there should be a streamflowing water on the ground; they often go there to drink, the explorers say.She started to run in that direction and then paused. Hurry up! she yelled, unable to contain her enthusiasm. Our new home is extraordinary!QuestionIn First Steps, which theme is developed by Marias volunteering to leave the lander?Some things cannot be learned in school.Some things cannot be learned in school.It takes courage to be the first to try something new.It takes courage to be the first to try something new.Taking unnecessary risks is foolish.Taking unnecessary risks is foolish.Great tasks can be accomplished by working as a team. What types of risk does a new business owner face? what is the value of youth participating in volunteer work Is it possible for completely opposite adaptations to be most advantageous in different situations/for different species? use the tortoise and the hare as an example (scientifically). Why is it important to scientists for a hypothesis to be testable? How would the experiment differ if it were not? What is an example of each type? Write 3-5 sentences the managers of a car-detailing shop have decided to utilize the hawthorne effect to increase productivity, which means using cameras to film employees at work in order to isolate the parts of a job. It is difficult for molecules to pass through the phospholipid bilayer because.