Answer:
During an experiment, if you purposely change the temperature to test a hypothesis, the temperature is called the manipulated variable.
Explanation:
A scientist is designing an investigation to find out what is the amount of light that a plant receives is related to how much food the plant has to help it grow. For her experiment, the scientist plans to get one plant only one hour of light per day another plant five hours of light per day and a third plant 10 hours of light per day. Then she will use a roller to measure how much each plant grows each day. The set up for her experiment is shown below. Which of the following will help make sure that the investigation is a fear test?
a. Use the three different types of lightbulbs.
b. Give the plants with less light more fertilizer.
c. Give each plant the same amount of fertilizer.
d. Use three different types of plants.
Answer:
c
Explanation:
two find the effect of a variable ,which is light in this experiment, all the other conditions should be fixed
witch statement is one of the three parts of cell theory
The three statements that make up the cell theory are as follows:
Cells are the fundamental and basic unit of lifeAll living organisms are made up of one or more cellsAll cells arise from pre-existing cellsWhat is the cell theory?Cell theory is the scientific theory proposed by three scientists that all living organisms are made of cells as the smallest functional unit.
The cell theory was proposed in 1830's by three scientists namely;
Mathias ScleidenTheodor SchwannRudolf VirchowThe components of the widely accepted cell theory are as follows:
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Example of the nucleus acid include
Answer:
Explanation:
Two examples of nucleic acids include deoxyribonucleic acid (better known as DNA) and ribonucleic acid (better known as RNA). These molecules are composed of long strands of nucleotides held together by covalent bonds
Which area of the ocean, as described above, best fits the definition of a commons?
The area of the ocean, as described above, that best fits the definition of a commons is The high seas
This is because the part of the oceans that lie beyond coastal states' 200-mile exclusive economic zones—is a commons and this is an area that is known as the high seas.
With this in mind, an ocean which is a body of salt water that is found in huge basins on Earth's surface and the commons that can be found there is the high seas.
What is a Commons?This refers to the cultural and natural resources that people in a community have access to and these can include natural materials that are used by all such as air, water, etc.
Hence, we can see that The area of the ocean, as described above, that best fits the definition of a commons is The high seas
This is because the part of the oceans that lie beyond coastal states' 200-mile exclusive economic zones—is a commons and this is an area that is known as the high seas.
With this in mind, an ocean which is a body of salt water that is found in huge basins on Earth's surface and the commons that can be found there is the high seas.
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which of the following structures in a human cell contains the cells genetic information
Answer:
The NUCLEUS contains chromosomes, the thread-like structures made of deoxyribonucleic acid, which are the structures that contain the body's genetic information.
What features do all arthropods have in common
Answer:
they all have a exoskeleton, bi-lateral symmetry, jointed appendages, segmented bodies, and specialized appendages.
Explanation:
Answer:
An exoskeleton is what all arthropods have in common. This is a feature where the organism has a skeleton outside its skin rather than inside like humans do.
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True or false: If you take a thermal energy source and combine them with inorganic
molecules, you can create protein structures. Explain.
yes we can combine the thermal energy sources with inorganic molecules and we can also make a structures.
The thermal energy also called heat energy which are produces from the following sources such as combustion, burning of fossil fuels and microwaves etc.along with heat energy but few gases are also released which we can used for our own purpose.In case of inorganic molecules or compound are those which does not include carbon sources but other molecules like Sulphur , nitrogen etc.For the formation of any compound we need energy either to break the bond or to formed the new bond. For example to formed the diamond we burnt the coal at very high temperature and large amount of heat is supplied.Therefore, the energy and molecules can combine together to formed the biomolecular structure or any other molecular structure.
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What would happen to homeostasis in the kangaroo rat's body if it was unable to concentrate urine in its kidneys?
under what conditions might a predominantly sandy soil be advantageous for plant growth
The majority of flowering plants benefit from the sandy soil's ability to drain effectively because it is lighter weight, doesn't compact, and generally makes for easier digging and composting than clay soils.
A loose, airy texture that doesn't compact and encourages proper drainage are just a few advantages.Carrots and other root crops grow neatly straight, and the roots of all plants spread out more readily.Sandy soil has a longer growing season because it freezes later in the winter and warms up more quickly in the spring.Due to the comparatively large particle size in sandy soils, they are less fruitful than other soil types and more likely to dry up.Sandy soils are sometimes thought of as having simple-to-define physical characteristics, such as a lack of structure or a weak structure, poor water retention abilities, high permeability, and high sensitivity to compaction with numerous negative effects.
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Can you make a sentence with the words cell, microorganism, nanometer, microscopic, micrometer, and molecule?
A micro-organism is made up of molecules called cells which can be seen through microscopic techniques with diameter ranging from 0.1-100 micrometer and a DNA of 2.2-2.6 nanometers.
What is a Cell?A cell is the fundamental unit of life. Every living organism is made up of cell.
A cell has three main parts i.e., the cell membrane, the nucleus and the cytoplasm. The cell membrane is the outer-covering of the cell. Nucleus is the organelle which contains important genetic information in the form of nucleic acids- DNA or RNA. Cytoplasm is the fluid fills the cell. All the organelles are suspended in cytoplasm.
Therefore, Cell is the smallest unit that can survive independently.
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does anabolic or catabolic release energy?
Answer:
so yes
Explanation:
Catabolic reactions break down complex chemicals into simpler ones and are associated with energy release. Anabolic processes build complex molecules out of simpler ones and require energy.
When the copper (II) sulfate and sodium hydroxide indicator turns from blue to purple, that means:
When the copper (II) sulfate and sodium hydroxide indicator turns from blue to purple, that means that protein is present.
What are food tests?We know that foods are those chemical substances that we take into the body for the nourishment of the body. Foods are broken down by certain chemicals in the body called enzymes in order to produce energy.
Since foods are chemical substances, they can be identified by interaction with other chemical substances. One of the indicators used in a food test is copper (II) sulfate and sodium hydroxide.
When the copper (II) sulfate and sodium hydroxide indicator turns from blue to purple, that means that protein is present.
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Arjulia soaked six different kinds of seeds in water for 24 hours. Then she planted the seeds in soil at a depth of 1 cm. She used the same amount of water, light, and heat for each kind of seed.
Answer:
a
Explanation:
Desalination is a process by which salt is removed from a salt water solution. This process is done by heating water. Why would heating the water separate the solute and solvent in this case?
*
1 point
The water will evaporate before the salt, thus turning it into a gas and leaving the salt behind
The heat will cause the particles of the solution to move so fast that they shake themselves apart
The water and salt will undergo a chemical change from the added heat. One of the indicators of chemical change is a change in color, so you will be able to see which is water and which is salt and separate them
Heating salt water will separate the solvent from the solute because the water will evaporate before the salt, thus turning it into gas and leaving the salt behind.
What is evaporation?Evaporation is a process whereby molecules of liquids gain energy and change to gas.
In chemistry, evaporation can be used to separate a mixture containing water and salt. This is because water boils and evaporates before salt.
Since water forms the solvent that dissolved the salt, once it evaporates off the mixture, what is left behind would be the solute, the salt.
Before the molecules of the salt can think of evaporating, they will first have to become a liquid - melt. After melting, the liquid molecules can then gain energy to evaporate.
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7) You want to test which size of soccer ball is easiest to juggle with your feet. You test a size 3, size 4 and a size 5 ball. You have someone time how long the ball stays in the air for each of the trials. You test each size ball a total of ten times, and average the time for each.
What is the dependent variable?
What is the independent variable?
What is the controlled variable(s)?
how many grams of calcium chloride would you add to water for a total volume of 500ml to make 5% solution
25gm of calcium chloride(CaCl2) added to water for a total volume of 500ml to make 5% solution
You must prepare a 5% calcium chloride (CaCl2) solution in order to answer this question. There should be 1000 grams of weight for every 1000 ml of water. The required CaCl2 for a 5% solution would then be:
5% * 500 ml * 1 g/ml = 25 g
Since 1 calcium and 2 chlorine combine to form calcium chloride, the molecular mass is calculated as (1*40) + (2*35.5) = 111 gram/moles. In such case, 25 grams of CaCl2 would be equal to 25/111 moles when divided by 111 grams.
The mole per 1000 ml of solvent is the molarity unit. Accordingly, the solution's molarity would be as follows: (25/111 moles) / (500ml/1000ml)= 50/111M= 0.45M
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What is meant by food insecurity?
The potential decline in agricultural productivity due to reduced soil fertility as a
result of multi-cropping.
The condition in which people live with chronic hunger and malnutrition likely due to
poverty.
The increased pressures on food production as a result of increases in global
population.
The potential decline in agricultural productivity due to conservation tillage.
In the picture, identity the following
stages in the cell cycle.
A.
B.
C.
D.
E.
Which phase is not represented in this picture? Why?
The cell cycle involves the interphase, cell division, and cytokinesis. processes. A- Telophase, B- Anaphase, C- Metahase, D- Prophase, E- Interphase. The phase we can not see is cytokinesis.
What is the cell cycle?
The cell cycle is composed of three main stages: the interphase, cell division, and cytocinesis.
During the interphase, the cell prepares to divide. It duplicates its size and content, including genetic material. This phase is divided into three stages: G1, S, and G2 stages.
After the interphase the cell goes through division,
somatic cells and germ cells → mitosis germ cells → meiosisMitosis is a process by which, from a diploid somatic cell (2n), two daughter diploid cells (2n) are produced.
Mitosis occurs in only one phase.
In the prophase, it occurs chromosome condensation and nuclear membrane breaks. During the metaphase, fibers of the spindle apparatus capture chromosomes and take them toward the center of the cell, to the equatorial plane, where they line up.Each chromatid joins with a microtubule of opposites poles.
Sister chromatids are held together until they reach the Anaphase, during which other enzymes are activated to break the bonds and separate the chromatids, which migrate to the opposite poles. In telophase, the duplicated chromosomes are already in the corresponding poles, and the nuclear membrane forms again in each pole.Finally, occurs cytokinesis.
In the exposed image we can see a piece of tissue and different cells in different division stages.
A- Telophase ⇒ we can see the uncondensed chromosomes already in the poles.
B- Anaphase ⇒ we can see chromatids migrating to the opposite poles.
C- Metaphase ⇒ We can see the chromosomes aligned in the equatorial plane
D- Prophase ⇒ We can see chromosomes in the nucleous before the nuclear membrane breacks. The nucleolus is not visible anymore.
E- Interphase ⇒ The nucleus is still well-defined and the nucleolus is visible.
Cytokinesis is the stage we can not see. This might probably be because,
neither of the cells has reached this stage yet or has already occurred. the used stain does not show the cytoplasm.
Cytokinesis should be seen as a thin, light membrane separating cytoplasm and the new nuclei.
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If there is a pollution plume on one side of an aquifer, and someone pumps water from the opposite side of the aquifer, do you think the pollution plume will move towards the pump, away from it, or stay in the same place?
The pollution plume will move towards the pump when someone pumps water from the opposite side of the aquifer when there is a pollution plume on one side of an aquifer.
What is a plume in the environment?A column of liquid, gas, or dust traveling through another is referred to as a plume. In general, we refer to things like smoke flowing from a chimney or steam issuing from a smokestack at a power plant as plumes. A plume could also be a snowflake or a raindrop.
As water flows through and down to an aquifer, certain pollutants are filtered by rock and soil. From the source, a plume of contaminants moves outward through the aquifer in the direction the water is flowing.
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If you are stirring sugar into your morning coffee, why do the sugar grains appear to disappear?
*
1 point
The sugar is transforming into coffee molecules due to dissolving
The coffer and sugar are combining in a chemical reaction to create a new, sweeter coffee
The grains of sugar are being pulled apart by polar molecules in the coffee to create the solution
Problem 1
A botanist studying flowering plants observed that when two true breeding
(homozygous) plants, one with white flowers and one with pink flowers, were
crossed, the resulting F₁ progeny were all pink.
a) What is the dominant phenotype?
The dominant phenotype is Pink
A monohybrid cross is made up of two homozygous individuals that have the opposing phenotype for a particular genetic characteristic. "A monohybrid cross is a cross between two monohybrid characteristics (TT and tt)." The monohybrid cross is in charge of passing one gene on.
What is a Dominant phenotype ?When two dominant alleles are inherited (homozygous dominant) or when one dominant and one recessive allele are inherited, a trait is said to have a dominant phenotype (heterozygous dominant).The relationship between two genetic variants is referred to as dominant. Each gene has two alleles that an individual inherits from each parent. One allele of a gene, known as the dominant gene, will be expressed if the alleles are different.Learn more about Dominant phenotype here:
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How was hellenistic Greece influenced by Classical Greece?
Classical Greece helped with the art and construction styles.
The color of the fur is the
.The genetic combination of alleles that determine the fur color is called the
.
Which statement best represents how structure relates to function?
When a sandhill crane finds a mate, it bonds for life.
Longer legs and different hip bones let modern humans walk upright
Parrots typically lay clutches of 2-4 eggs per year.
Hummingbird feathers come in a wide variety of iridescent colors.?
Great white sharks have sharp serrated teeth for tearing into their prey. It can last for years until one of the cranes dies. A Hummingbird's feathers are iridescent and reflect light due to the structural make-up of the feather.
Hummingbird feathers are in general black, brown, white, and reddish brown. The mirrored image of mild off their unique feathers gives an iridescence and brilliance to the hummingbird's shade. Hummingbirds have almost one thousand feathers on their frame. The definition of iridescent is something that has rainbow-like colors. An instance of iridescent is the inner of an abalone shell. outstanding, lustrous, or colorful.
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Plss help meee pls :’0
Choose a plant structure and animal structure that serve a similar function in each
organism. Describe the structures and how they each organism survive.
Answer:
Structurally plant and animal cells are very similar because they are both eukaryotix cells they both contain membrane bound organisms such as nucleus method
what infomation does DNA provide to all of the cells organelles?
It gives information to every cell organelle to perform its own functions.
The DNA is called deoxyribonucleic acid and is the hereditary material in organisms and is responsible for all the characteristics and traits represented by an organism DNA is very important as it brings variation and also evolution the generations which also increases the rate of survival and also the desirable and improved characters and also it leads to natural selection and the survival of the fittest and DNA also helps in providing information to the cell organelles like every cell organelle has their own function and DNA is present in the nucleus which is called as the brain of the cell and this provides the information to every cell organelle that when they need to work and what they need to work for example the Golgi apparatus has the work to pack the material and transport it from one place to another in the body or ribosomes to make proteins or to some they give information to phagocyte itself whenever a foreign agent enters the body so that they doesn't harm the immune system of the body and the DNA is also present in mitochondria and cholroplast so they also can function as semi autonomous body and they also direct to their function because of DNA to perform the powerhouse of cell and generating ATP.
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Why is melted ice cream an example of a physical change? A. Changing from solid to liquid has not kept the molecules and atoms intact, which means the matter has changed. B. Once ice cream changes from a solid to a liquid, the matter has changed cannot be returned to its solid form. C. Even though the form has changed from solid to liquid, the matter has not changed. D. The form has changed from solid to liquid, and the atoms from two kinds of matter have made a completely different substance.
The fluid-mosaic model of cell membranes refers to the discovery that membranes are composed
of a bilayer of phospholipids with proteins embedded; both phospholipids and proteins can easily
flip from inside to out (or vice versa), but cannot move laterally in the membrane.
O True
O False
Answer:
False
Explanation:
The fluid mosaic model describes the cell membrane as a tapestry of several types of molecules (phospholipids, cholesterols, and proteins) that are constantly moving.Membrane proteins and phospholipids are unable to move back and forth between the inner and outer leaflets of the membrane at an appreciable rate. However, because they are inserted into a fluid lipid bilayer,both are able to diffuse laterally through the membrane.
Individual phospholipids and proteins can rotate and move laterally within a bilayer.
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The following map was created using modern technology to determine the overall temperature of the oceans. what can be concluded about the relationship between temperature and salinity from the map?
Public Domain
O Salinity is lower in areas that have decreased precipitation
O There isn't a correlation between temperature and salinity
O Lower temperatures cause an increase in evaporation, which affects salinity
O Higher temperatures cause an increase in evaporation, which affects salinity
Answer:
It could relate to a salinity map because when the temperature rises so does the salinity. With this map it is more warmer in the middle of the oceans, and towards the outer parts of the oceans it is more colder.
Explanation:
Answer:
It's D
Explanation:
Higher temperatures cause an increase in evaporation, which affects salinity
Which list is an organ system?(1 point)
a. the heart, arteries, and veins
b. the heart, the stomach, and intestines
c. the liver, the bladder, and the heart
d. the liver, blood, and skin
I selected D. do you think its correct?
Answer:
B
Explanation:
the heart, the stomach and intestines