The statements that describe the characteristics of stomata in plants are: permit carbon dioxide (co2) to enter and oxygen (o2) to escape from a plant, are pores enclosed by guard cells that are located on plant surfaces.
In the field of science, stomata can be described as structures present inside the leaf surfaces that allow the exchange of water and gases between a plant and the environment. The stomata can also be found in the stems of a plant.
The opening and closing of the stomata occur through the guard cells. When oxygen or water is to be removed from the cell, the guard cells are opened. When oxygen or water is not to be removed, the guard cells remain closed.
Stomata also allow the taking in of carbon dioxide by the leaves that is required for photosynthesis.
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An insertion sequence contains a large deletion in its transposase gene. Under what circumstances would this insertion sequence be able to transpose?.
(3) "There is another transposable element of the same type present in the cell and it expresses a functional transposable enzyme." is the circumstance that this insertion sequence would be able to transpose.
Bacterial insertion sequence is a type of straightforward transposon. DNA segments known as transposons have the capacity to relocate throughout the genome. Only the genes necessary for their transposition are carried by insertion sequences.
The protein needed for the transposition of bacterial insertion sequences is called transposase. The binding sites for this protein are the brief repetitions found at both ends of the bacterial transposons.
Transposase's primary job is to make staggered incisions in the target DNA region where the insertion sequence will be put. The target DNA has a gap created by the transposase cut, which is where the bacterial transposons are placed.
It wouldn't be able to transpose if a deletion mutation eliminated the transposase gene from the insertion sequence.
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Question correction:
An insertion sequence contains a large deletion in its transposase gene. Under what circumstances would this insertion sequence be able to transpose?
There is another transposable element that produces reverse transcriptase present in the cell.The transposable element is transcribed, and the host cell also expresses a functional reverse transcriptase that then makes a DNA copy.There is another transposable element of the same type present in the cell and it expresses a functional transposase enzyme.This transposable element can never transpose due to the deletion in its transposase gene.The insertion sequence will be able to transpose if it loses its inverted repeats.All of the following are steps in the scientific method except_
Select one:
a. conclusion
b. hypothesis
c. observation experiment
e. scientific law
What do we call the specialized neurons in the occipital lobe’s visual cortex that respond to particular edges, lines, angles, and movements?.
We call specialized neurons in the occipital lobe’s visual cortex that respond to particular edges, lines, angles, and movements "feature detectors".
What are feature detectors?
Feature detectors are neurons present in the central nervous system, more specifically the brain. They efficiently receive visual information and respond to specific features, such as lines, edges, angles, movement, etc.
What makes these neurons special is the way they help the body respond to some type of visual stimulus that has unique characteristics.
In summary, feature detectors made it possible for humans to identify the shape of an object. A football goal keeper, for example, can easily identify a fast moving round ball and predict the angle to fly so as to complete a save. Identifying that round ball and the angle it is coming at is the function of feature detectors.
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Relate dark matter to the development of the universe after the Big Bang. In 3-5 sentences, speculate on how the development of the universe would have been different if there had been no dark matter. In your answer, use the term structures.
The development of the universe would not be able to move or function if there had been no dark matter.
What is Universe?This is referred to as the space, energy and matter present in space and is also everything we can feel, touch or see. Examples of the constituents include stars, planet etc and they have their unique properties and functions.
Without the presence of the dark matter in the universe, there will be no formation of the larger versions of those galaxies and the universe won't be able to move or function thereby making it the correct choice.
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I don’t understand this question
Answer:
Explanation:
which question do you not understand?
if you write the question you do not understand, I can help you
which events are potential effects of a point mutation within a protein coding gene? an extra sequence of amino acids is inserted in a protein, but the protein still functions. a nucleotide is replaced with another nucleotide, but the amino acid sequence remains the same. a segment containing many nucleotides is added, and the amino acid sequence changes. an incorrect amino acid is placed in a protein, and it affects how the protein functions. a nucleotide is used in place of another, and the change results in a stop codon.
An event which is a potential effects of a point mutation within a protein coding gene is: B. a nucleotide is replaced with another nucleotide, but the amino acid sequence remains the same.
What is a nucleotide?A nucleotide can be defined as the subunit of deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) which typically comprises a nitrogenous base. Additionally, some portion of the nucleotide include the following:
A nitrogenous base.A phosphate group.Deoxyribose sugar (5-carbon sugar).What is point mutation?Point mutation can be defined as a type of genetic mutation that occurs in a genome, which typically changes a deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) when a single base pair is deleted, added, modified or changed (altered).
In Genomics, it has been proven by scientific research that when a point mutation occurs within the protein coding gene, it typically causes a nucleotide to be replaced by another nucleotide, while the amino acid sequence of the nucleotide would remain the same.
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Humans are omnivores as shown by the type ofa. enzymes secreted in saliva b. urine they produce c. teeth they have d. taste buds they have
Answer
C - teeth they have
Explanation
Answer:
C. Teeth they have
Explanation:
Carnivores, herbivores and omnivores may have some similarities in the shape and size of teeth, but each have teeth that are specifically adapted to the drastically different diets these animals consume.
What did West Virginia change in its constitution compared to that of Virginia?
West Virginia compared to that of Virginia does not feature a process for initiated constitutional amendments in their constitution.
What is constitution?A constitution is described as the aggregate of fundamental principles or established precedents that constitute the legal basis of a polity, organization or other type of entity and commonly determine how that entity is to be governed.
The state of west Virginia has some differences in their constitutional amendment processes which is means that they do not feature the process for initiated constitution amendment.
Therefore in conclusion, amendments in West Virginia can only be put on the ballot done either through referral by the legislature or by a constitutional convention.
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According to Newton’s first law of motion, when will an object at rest begin to move?
when its inertia decreases to zero
Answer:
Newton's first law states that an object will remain at rest or move at a constant speed in a straight line unless it is acted on by an unbalanced force. According to Newton's first law, an unbalanced force is needed to move the book on your desk.
Explanation:
Thus, according to Newton's first law of motion, an object at rest begins to move when an unbalanced force acts upon it.
What happens directly after anaphase?
• A. Metaphase
• B. Interphase
• C. Telophase
O D. Prophase
(C) Telophase happens directly after Anaphase.
Telophase is the last phase of the M-phase of cell division. It occurs in both mitosis as well as meiosis. It is the termination phase where the divided chromosomes reach on the poles and start to unwind, the mitotic spindle disassembles and all the cell organelles reappear.
Anaphase is the third phase of the M-phase of cell cycle. In this phase the actual separation of the chromosomes occurs in the opposite poles so that each daughter cell gets its share of genetic material. The mitotic spindles remain attached to the chromosomes during anaphase.
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A petri dish contains one yeast cell whose nucleus contains 24 chromosomes. After the cell undergoes one round of its cell cycle, it will contain __ cells, each with ___ chromosomes.
A petri dish contains one yeast cell whose nucleus contains 24 chromosomes. After the cell undergoes one round of its cell cycle, it will contain 48 cells, each with 24 chromosomes.
What is the Cell cycle?The cell cycle may be defined as the entire sequence of events happening from the termination of one nuclear division to the initiation of the next in a series of steps.
It is known that a yeast cell undergoes mitotic cell division. In mitosis, each parental cell produces two daughter cells with identical genetic material in each of them. So, the amount of chromosomes remains the same, i.e. 24 but the cell number increase twice.
Therefore, after the cell undergoes one round of its cell cycle, it will contain 48 cells, each with 24 chromosomes.
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how does facilitated diffusion differ from simple
Answer: in facilitated diffusion there are a specialized membrane channels.
Explanation:
1.What would happen to our growth and development if the pituitary gland is damaged or removed? Explain with example.
2.How do insulin and glucagon maintain blood glucose levels?
3.How is the development of secondary sexual characteristics , such as onset of meanstruation, growth of hair, and production of sperm and eggs related to gonads?
okk
If the pituitary gland is damaged or removed, our growth and development are adversely affected.
Insulin reduces blood sugar levels.
The development of secondary sexual characteristics is directly related to gonads.
What would happen if your pituitary gland can't work properly?The pituitary gland is known as the master gland of the endocrine system because it controls many hormone glands in our body. Without Pituitary glands, the body wouldn't reproduce and grow properly and many other functions are not working properly in our body.
Insulin reduces the blood sugar levels in our body and provides glucose to the cell for the production of energy. When blood sugar levels are too low, the pancreas releases glucagon in the blood with help of insulin. Glucagon is a type of hormone that pancreas help to regulate your blood glucose levels. The liver release stored glucose which causes the blood sugar levels in the body to rise.
The pubertal changes in secondary sex characteristics like breast development, fat deposition, development of genitalia, changes in the larynx, and hair growth lead to increasing levels of gonads.
So we can conclude that our growth and development are adversely affected if the pituitary gland is damaged or removed.
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How is the taiga important to birds from other biomes? why can’t the summer birds live in the taiga year round? (site 1)
Taiga is important as it provides a pleasant climate.
The taiga is crucial for the summer birds as a biome because it gives them a more comfortable environment and enough food during the summer when in the southern biomes it is considerably hotter and there is much less food and water available. However, the taiga only offers these favorable circumstances in the summer.
Due to the taiga's extremely cold climate, where the majority of the years see temperatures as low as -40 and -50 degrees regularly, the ground is frozen as are the tree branches, and there is a severe lack of food, summer birds are unable to live there year round and must migrate south as the summer in taiga comes to an end.
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(20!!! PLS)Select the type of inheritance pattern that is best described below:
In addition to the A and B molecules found on the surface of red blood cells, humans also have M and N molecules. The genotype LMLM produces the M phenotype. The genotype LNLN gives the N phenotype. Individuals of genotype LMLN have both kinds of molecules on their red blood cells, and their phenotype is MN.
a. Incomplete Dominance
b. Codominance
c. Multiple Alleles
d. Polygenic Inheritance
e. Pleiotropy
Codominance is the type of inheritance pattern that is best described below.
Codominance, refers to a type of inheritance in which two alleles of the same gene are expressed separately to yield different traits in an individual.
The best example of codominance is ABO blood group. ABO blood grouping is controlled by gene I which has three alleles A, B, and O and show codominance. Codominant expression occurs when two different alleles are inherited at the same genetic location, and the products of both of the alleles are expressed. Codominance is the most common pattern in blood group genetics.
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sam and diane are carriers of the recessive allele causing tay-sachs disease, which is lethal in early childhood. if they have a healthy child, what is the percent chance that this child is not a carrier of tay-sachs disease?
The chances of Sam and Diane's healthy child not carrying Tay-Sachs disease will be 75 percent.
The Tay-Sachs infection is caused by a change in the HEXA gene. Tay–Sachs illness is an autosomal passive hereditary clutter, meaning that when both guardians are carriers, there's a 25% hazard of giving birth to an influenced child with each pregnancy.
A changed duplicate of the quality is passed from each parent to the influenced child. The causes are hereditary.
Tay-Sachs disease is a metabolic hereditary clutter that appears a dynamic weakening of mental and physical capacities due to nerve harm in the brain and spinal rope. It comes about in loss of muscle control and the long run, leads to visual impairment, loss of motion, and passing.
In this case, Sam and Diane have the recessive alleles for Tay-Sachs disease, so the healthy baby will have a 75percent chance of not having the disease.
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How did DDT nearly drive the peregrine Falcon to extinction in the 1950s and 60’s?
It was frequently employed in the 1950s and 1960s to get rid of insects that ate crops.
Briefing:However, DDT was essentially outlawed in the United States in 1972 after researchers found that birds like the peregrine falcon and bald eagle were eating the pesticide and were unable to hatch offspring due to eggshell weakening.
Is peregrine falcon the fastest animal?The peregrine falcon, the fastest bird and fastest animal in the world, is best renowned for its diving speed when flying, which may reach more than 300 km/h (186 mph). The underparts are white to yellowish white, with black bands on the bluish gray upper parts of the bird.
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as a breeder of purebred dogs, your dogs have been plagued with a recessive genetic defect that is not lethal, but is undesirable. you mate a male to an affected female (she actually has the genetic defect, but is capable of reproducing) and obtain a litter of 8 normal pups (none of the pups exhibit the genetic defect). what should you conclude?
genetic study that sought to tie the behavior of various dog breeds to their ancestry. The percentage of purebred dogs was around 50%, with the other dogs being "mutts." For specific breeds, some of the outcomes were relatively predictable, while many results showed no association.
For instance, Belgian shepherds, Border Collies (a type of herding dog), and Hungarian Viszla dogs shown the highest association between genetics and the capacity for understanding human speech and obeying directions (a trait known as biddability) (a hunting dog). Additionally, owners were asked to provide a list of other habits, and the researchers looked to see whether there were any genetic ties to those behaviors. "Doesn't bury toys" was a resoundingly favorable response, considering only 90% of Greyhounds do this. "Gets caught behind objects" (linked to genes for cognitive ability) and "howling" were the two negative behaviors most frequently mentioned as having a significant genetic component (near a gene involved in speech and language).
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. which of the following correctly identify which organs develop from different embryonic tissue layers in a frog? liver develops from endoderm, nerves develops from mesoderm, muscles develop from ectoderm brain develops from endoderm, heart develops from mesoderm, epidermis develops from ectoderm liver develops from endoderm, heart develops from mesoderm, brain develops from ectoderm notochord develops from endoderm, liver develops from mesoderm, eye lens develops from ectoderm
The following correctly identifies which organs develop from different embryonic tissue layers in a frog is Gastrula.
The ectoderm gives rise to the nervous system and epidermal skin cells the mesoderm gives rise to the muscle cells and connective tissue in the body, and the endoderm gives rise to the digestive system and other internal organs. The fertilized egg becomes a hard ball of cells increase. It then becomes a hollow ball of cells called a blastocyst In the uterus the blastocyst nests in the uterine wall.
Attaches to the placenta and develops into an embryo surrounded by a fluid-filled membrane. Gastrulation is defined as an early developmental process in which the embryo transforms from a one-dimensional layer of epithelial cells and reorganizes into a multilayered and multidimensional structure called the gastrula. Cotyledons are the primary cell layer formed during embryonic development.
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what is cellular respiration and why it is essential for all living cells?
Answer:
Cellular respiration is a process in which glucose is broken down to produce ATP, or energy. This same energy is essential to all processes within the cell, powering almost everything.
I'm sorry I couldn't provide a better explanation :(((
Which of the following is always represented by a chemical formula?
elements ions compounds mixture
which of the following types of molecules are the major structural components of the cell membrane? phospholipids and cellulose proteins and cellulose phospholipids and proteins nucleic acids and proteins
Proteins and phospholipids make up the majority of the cell membrane's structural elements.
What is plasma membrane?
The majority of the plasma membrane is composed of proteins, carbs, and lipids (including phosphatidylcholine). The plasma membrane protects intracellular components from the extracellular environment. The plasma membrane, that also mediates cellular functions, regulates the substances that enter and leave the cell. The majority of the plasma membrane is composed of lipids (phospholipids as well as cholesterol), proteins, as well as carbohydrate groups linked to some of the lipids and proteins. Phospholipids are lipids made up of glycerol, two fatty acid tails, as well as a phosphate-linked head group.
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what is the diagnostic term for the condition that results whenever the tissue surrounding the kidney fails to anchor it to nearby structures and the kidney droops?
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which of the following are methods used by biologists to distinguish different species? multiple select question. observing the outward appearance of individuals assessing whether the organisms occupy the same space determining evolutionary relationships and lineages determining if individuals physically interact with one another assessing the ability of individuals of different groups to successfully interbreed analyzing dna or other molecular sequences
The methods used by biologists to distinguish different species are: analyzing DNA or other molecular sequence
observing the outward appearance of individuals
assessing the ability of individuals of different groups to successfully interbreed
determinating evolutionary relationships and lineages
determining the organisms' ecological niches
Scientists use many ways to distinguish different species. Scientists use the DNA of organisms to look for similarities and differences in them. Based on these similarities and differences, they are able to distinguish species.
Assessing the physical traits of an organism also helps in differentiating it from other species.
Evolution is also a big key to determining the relationship and differences among species.
The place where an organism lives and its ecological nice also help in determining the differences and similarities in species.
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in the light dependent reactions, when light strikes the pigments and excided electrons are passed to p700 or p680 chlorophyll molecules what is the immediate result? excited electrons are passed to electron acceptors electrons are fused to form atp glucose is produced carbon fixation occurs
In light-dependent reactions, when light strikes the pigments and excited electrons are passed to p700 or p680 chlorophyll molecules, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water.
Within the light-dependent responses, which take put in the thylakoid film, chlorophyll absorbs energy from daylight and after that changes over it into chemical vitality with the utilization of water.
The light-dependent responses discharge oxygen as a byproduct as water is broken and separated.
Each photosystem is adjusted by the light-harvesting complex, which passes vitality from daylight to the response center. It comprises numerous radio wire proteins that contain a blend of 300–400 chlorophyll a and b particles as well as other colors like carotenoids.
The photon causes an electron within the chlorophyll to end up “excited.” The vitality given to the electron permits it to break free from a molecule of the chlorophyll atom.
Chlorophyll is in this manner said to “donate” an electron. The retention of a single photon or particular amount or “packet” of light by any of the chlorophylls pushes that particle into an energized state.
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Explain radiometric dating. Provide an example of how this process is used to determine absolute age.
Radiometric dating is a method of determining how old something (perhaps a wooden artifact, stone, or fossil) is based on the presence of radioactive isotopes.
The basic logic behind radiometric dating is to determine the age of the sample by comparing the presence of radioisotopes in the sample to their known abundances and known half-lives (decay rates) on Earth.
Radiometric dating helps determine the age of ancient objects because many radioactive materials decay slowly. Rock age is determined by radiometric dating, which examines the proportions of two different isotopes in the sample.
Because radioactive isotopes decay at predictable rates, geologists can use instruments like this thermal ionization mass spectrometer to date samples. The half-life of an element is the time it takes for exactly half the amount of that element to decay. The age of a sample can be determined from the ratio of parent and daughter isotopes in the sample.
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Explain how physical and
computer models can help
design a solution for an
ecological problem.
The physical and computer models can help design a solution for an ecological problem by showing the problem in the form of the model.
Why are models useful for ecological systems?Modeling provides possibilities for the exploration of ideas that are not easily pursued through field experimentation and in the laboratory. Ecologists use models to simulate the systems they study and to investigate theories of the way those systems operate. An ecosystem model is a collection of mathematical representations of an ecological system. There are three types of ecological models i.e. temporal, spatial, and spatial-dynamic.
So we can conclude that with the help of a model the problem can be shown so we can say that physical and computer models can help design a solution for an ecological problem.
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Which of the following answer choices BEST supports the idea that most attempts by scientists to create new elements will fail?
The answer choice which best supports the idea that most attempts by scientists to create new chemical elements will fail is that: (D) scientists have to repeat their experiments an enormous number of times; if it works once it's seen as a success.
What is a chemical element?A chemical element can be defined as a pure substance that comprises atoms having the same atomic number (number of protons) in its nuclei and as such, it is the primary constituent of matter. Also, a common characteristics for all chemical elements found on the periodic table is mass and volume.
In Chemistry, some examples of a chemical element include the following:
Carbon (C)Oxygen (O)Argon (Ar)Sodium (Na)Potassium (K)Mercury (Hg) Hydrogen (H)Zinc (Zn)In this scenario, we can reasonably infer and logically deduce that a statement which indicates that an attempt by scientists to create new chemical elements will fail is stating that "scientists have to repeat their experiments an enormous number of times; if it works once it's seen as a success." because an experiment to create new chemical elements must be tested and they all should have multiple successful results.
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Complete Question:
Which of the following answer choices BEST supports the idea that most attempts by scientists to create new elements will fail?
(A) Scientists have to create a target with a carefully chosen atom; this is a process that takes months.
(B) Scientists have to smash atoms together and get them to stick; a positive charge makes them repel each other.
(C) Scientists have to bombard particles with specific protons; specialized atoms combine with neutrons.
(D) Scientists have to repeat their experiments an enormous number of times; if it works once it's seen as a success
which of the following statements about the cytoskeleton is true? the cytoskeleton is produced by transport vesicles of the endomembrane system. chemicals that block the assembly of the cytoskeleton would have little effect on a cell's response to external stimuli. although microtubules are common within a cell, actin filaments are rarely found outside of the nucleus. the cytoskeleton of eukaryotes is a static structure most resembling scaffolding used at construction sites. movement of cilia and flagella is the result of motor proteins causing microtubules to move relative to each other.
The answer is yes this is true, the dynamic aspect of cytoskeletal function is made possible by the assembly and disassembly of a large number of complex proteins into larger aggregates. There are three types of the cytoskeleton: actin filaments (microfilament), microtubules, and intermediate filaments.
What does cytoskeleton mean?All cells, including those of bacteria and archaea, have a complex, dynamic network of interconnecting protein filaments called the cytoskeleton. It stretches from the cell nucleus to the cell membrane in eukaryotes and is made up of identical proteins in different animals.The cytoplasmic protein filament and microtubule network that regulates cell shape, upholds intracellular structure, and participates in cell motility. Examples of Other Words from Cytoskeleton More information on the cytoskeleton.Contractile bundles (found in muscle cells), the MTOC, the nuclear lamina, and the intermediate filament-based 'cage' that forms around the nucleus from flexible cables at the cell surface to the core of the cell are a few examples of higher-order cytoskeleton structures.Hence, the above statement is true.
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Defend your claim- What is crossing over?
When the chromosomes in a sex cell exchange genetic material during Meiosis I.
When the chromosomes in a sex cell randomly sort to different ends of the cell
during Anaphase I and Anaphase II.
When two sex cells combine to create a zygote, combining the unique genetic
code from each cell during fertilization.
When two sex cells cross paths and exchange genetic material during sexual
reproduction.
When the chromosomes in a sex cell exchange genetic material during Meiosis I. this is called crossing over.
What is crossing over?Crossing over in meiosis is the exchange of genetic material or chromosome segments between non-sister chromatids. This happens when homologous regions on corresponding chromosomes exchange with one another.
Significance:
The process of evolution depends on crossing across.
Genetic maps can be constructed thanks to its frequency.
It results in a novel gene combination.
What is chromosome?The thread-like chromosomes found in the nucleus are responsible for transmitting genetic material from one generation to the next. Cell division, inheritance, variation, mutation, repair, and regeneration all depend on them.
In eukaryotic cells, the genetic material is contained in chromosomes, which are composed of highly structured DNA molecules and supported by histone proteins.
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