The statement "the functioning of enhancers is an example of transcriptional control of gene expression". Option D is correct.
Enhancers are short DNA sequences that can be located far away from the gene they regulate and can interact with the promoter region of a gene to increase the transcription of that gene. They function through a variety of mechanisms that include recruiting transcription factors, modifying chromatin structure, and looping DNA to bring enhancer and promoter regions closer together.
Transcriptional control refers to the regulation of gene expression at the level of transcription, which is the process by which DNA is copied into RNA. Enhancers are a key component of transcriptional control because they can increase the transcription of a gene in response to specific signals or conditions.
Post-translational control refers to the regulation of protein activity after translation is complete, and initiation factors stimulate the initiation of translation, which is the process by which the RNA message is used to make a protein. These processes occur after transcription and are therefore not directly related to the functioning of enhancers.
While the eukaryotic promoter region functions similarly to the prokaryotic promoter region in terms of initiating transcription, enhancers are a distinct element that function in a different way to regulate gene expression.
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--The given question is incomplete, the complete question is
"The functioning of enhancers is an example of A) post-translational control that activates certain proteins. B) the stimulation of translation by initiation factors. C) a eukaryote equivalent of prokaryotic promoter functioning. D) transcriptional control of gene expression."--
what is the mostly phylogenetic tree based on these shared derived characters? When did these characters appear during the aliens'evolutionary history? Drag the lens and shared derived characters to their appropriate locations on this phylogenetic tree.
A derived feature is one that emerged in the lineage before a clade and distinguishes members of that clade from other people, whereas a shared character is one that two lineages share in phylogenetic tree.
How does a phylogenetic tree work?Understanding a phylogeny is analogous to reading a family tree. The root of the tree represents the lineage of the ancestors, while the points of the branches represent their descendants. By moving from the root to the tips, you advance through time. A lineage splitting (speciation) is shown as branching on a phylogeny. When a speciation event occurs, a single ancestral lineage produces two or more daughter lineages. A clade is a grouping of all current and extinct individuals of a lineage who descend from the same ancestor. A phylogeny makes it easy to establish whether a group of lineages is a clade. The phylogeny might be simplified by deleting just one branch, where the severed branch now contains a clade.
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who first captured sound using a bristle and a coated cylinder?
By using the vibrations of a bristle on a piece of soot-covered paper, Leon Scott's phonautograph, developed in 1857, had shown how ambient sound waves could be traced as a visual image.
What is captured sound using a bristle?When objects vibrate, pressure waves are created that our ears can detect as sound. These waves can be recorded when they move a microphone's membrane, and they can be reproduced by the amplified vibrations of a speaker's membrane.
Sound waves in the air are captured by recording equipment, which then transform them into electrical signals or digital data that can be saved on physical objects like records, CDs, and computer hard drives.
To replicate the original sound, playback equipment turns the recording process on its side.
Therefore, Édouard-Léon Scott de Martinvillefirst captured sound using a bristle and a coated cylinder.
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write the name of the arthropod class that contains organisms with many trunk segments, 2 pairs of walking legs per trunk segment. write one word as your answer spelled correctly, and one word only without any syntax.
Myriapoda, a family of arthropods that includes creatures with several trunk segments and two pairs of walking legs per trunk section.
A class, or subclass, of arthropods, related to the hexapod insects, from which they differ in having the body made up of numerous similar segments, nearly all of which bear true jointed legs. They have one pair of antennae, three pairs of mouth organs, and numerous trachaae, similar to those of true insects. The larvae, when first hatched, often have but three pairs of legs. See Centiped, Galleyworm, milliped.
The existing Myriapoda are divided into three orders: chilopoda, Chilognatha or diplopoda, and pauropoda (see these words in the vocabulary). Large fossil species (very different from any living forms) are found in the Carboniferous formation.
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a plant has the following characteristics: rhizoids (but no roots), stomata, spores (but no seeds), no xylem or phloem. what group does it belong to?
Based on the given characteristics, the plant belongs to the group of Bryophytes.
What are bryophytes?Bryophytes are small, non-vascular plants that lack true roots, xylem, and phloem. Instead of true roots, they have thread-like structures called rhizoids that help them attach to the substrate and absorb water and nutrients.
Bryophytes also reproduce via spores rather than seeds, and they have stomata on their leaves that allow for gas exchange. Examples of bryophytes include mosses, liverworts, and hornworts.
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what type of lipids form the main structure of the plasma membrane of cells?
The primary structural element of the cell membrane is composed of cholesterol and phospholipids.
Lipids are any organic molecules that are soluble in fat or oil but not in water. They include lipids, waxes, oils, hormones, and some cell membrane components and act as chemical messengers and energy storage molecules.
Lipids perform three major biological functions in the body: they are necessary signaling molecules, fundamental components of cell membranes, and facilities for energy storage. The three main types of lipids are sterols, phospholipids, and triacylglycerols (often referred to as triglycerides). Lipids are frequently referred to as fats or oils. In contrast to fats, which are compounds that are solid at room temperature, oils are substances that are liquid at this temperature.
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What is one way an organism could use auditory communication to help it survive?
Responses
marking territory
marking territory
greeting another member of the population
greeting another member of the population
calling for a mate
calling for a mate
calls to others to warn of a pred
Auditory communication is the use of sounds to send and receive information. Auditory communication is particularly important in birds. They use sounds to communicate warnings, attract mates, signal other birds to flock together, and for other important purposes. Some of the sounds made by birds are called birdsongs.
I guess all the options are correct
What is the problem with the biological species concept?
According to the generally recognised Biological Species Concept (BSC), a species is any collection of organisms that is able to interbreed and produce viable offspring.
However, there are certain restrictions and disadvantages to this idea. The BSC has a significant flaw in that it is unable to distinguish between species in asexual organisms, like the majority of bacteria, which may reproduce without the need of two separate parents.
Furthermore, because hybrids typically lack the ability to generate healthy offspring because of the blending of diverse genetic materials, the idea fails to detect species in hybrids. Furthermore, because the BSC depends on being able to monitor a species' reproductive activities, it cannot be used to study extinct species.
Finally, the notion relies significantly on the common assumption that species are unique and reproductively separated, which is not necessarily true. The power of the Biological Species Concept to precisely define species is therefore constrained.
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a measure of the strength of the relationship between individual differences in a given trait and individual genetic differences is called the
A measure of the strength of the relationship between individual differences in a given trait and individual genetic differences is called heritability.
Heritability is a statistical measure that indicates the extent to which differences in a particular trait among individuals within a population can be attributed to genetic differences. It is typically expressed as a value between 0 and 1, where 0 indicates that the trait is not influenced by genetic factors, and 1 indicates that the trait is entirely determined by genetic factors. Heritability estimates are calculated by comparing the degree of resemblance for a trait between pairs of individuals who vary in their degree of genetic relatedness. For example, the heritability of height can be estimated by comparing the heights of siblings (who share, on average, 50% of their genetic material) to the heights of unrelated individuals. If siblings are more similar in height than unrelated individuals, this suggests that height has a significant genetic component. However, it is important to note that heritability estimates apply only to a specific population and environment, and may not generalize to other populations or environments.
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what is the function of the liver?
Answer:
The liver is a complex and multifunctional organ that performs several critical functions in the body, including:
Metabolism: The liver processes and stores various nutrients, including carbohydrates, fats, and proteins, and converts them into forms that the body can use.
Detoxification: The liver helps remove harmful substances from the blood, such as drugs, alcohol, and toxic byproducts of metabolism.
Bile production: The liver produces bile, which is essential for the digestion and absorption of fats and fat-soluble vitamins in the small intestine.
Blood glucose regulation: The liver plays a key role in regulating blood sugar levels by releasing glucose into the bloodstream as needed and storing glucose as glycogen when there is an excess.
Blood clotting: The liver produces several important blood-clotting factors that help prevent excessive bleeding.
Vitamin and mineral storage: The liver stores important vitamins and minerals, such as iron, copper, and vitamin A.
Hormone regulation: The liver plays a role in the production of several hormones, including insulin, glucagon, and estrogen.
Overall, the liver is essential for maintaining overall health and proper bodily function.
Explanation:
At which kind(s) of plate boundaries does subduction occur?
Subduction occurs at convergent plate boundaries, where two tectonic plates are moving toward each other.
There are three types of convergent plate boundaries, depending on the type of crust that is involved:
Oceanic-Continental Convergent Boundary: This occurs when an oceanic plate collides with a continental plate. The denser oceanic plate is subducted beneath the less dense continental plate, leading to the formation of a deep-sea trench and a volcanic arc on the overriding continental plate.Oceanic-Oceanic Convergent Boundary: This occurs when two oceanic plates collide. The older and denser plate is subducted beneath the younger and less dense plate, leading to the formation of a deep-sea trench and a volcanic island arc.Continental-Continental Convergent Boundary: This occurs when two continental plates collide. Neither plate is subducted because they have similar densities. Instead, the collision leads to the formation of a mountain range and intense earthquakes.To learn more about plate boundaries, refer:-
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what is the megagametophyte also know as in angiosperm reproduction?
The megagametophyte, or female or egg-producing gametophyte, is also known as an embryo sac in angiosperms. An ovule, which is housed within the ovary of a flower, is where the embryo sac develops primarily.
The mature embryo sac is a seven-celled, eight-nucleate structure in the majority of angiosperms. In honor of the genus Polygonum, this form of embryo sac is also known as the Polygonum-type (knotweed or smartweed). This form of embryo sac is considered to exist in the majority of angiosperms (about 70%). The term polygonum-type describes both the embryo sac's development course as well as its ultimate form.
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what is the purpose of the pleural fluid that surrounds the lungs?
Answer: The body produces pleural fluid in small amounts to lubricate the surfaces of the pleura. This is the thin tissue that lines the chest cavity and surrounds the lungs.
https://www.pennmedicine.org/for-patients-and-visitors/patient-information/conditions-treated-a-to-z/pleural-effusion#:~:text=The%20body%20produces%20pleural%20fluid,cavity%20and%20surrounds%20the%20lungs.
What is the name for the small movements of your eye that are pieced together by the brain into perceptually seamless visual movement? a) Saccades b) Motor jumps c) Ocular tracking d) Eye bursts
The brain first puts together what appears to be an image to our conscious awareness in the primary visual cortex, which is situated in the occipital lobes at the back of the head. Thus, option A is correct.
What is the perceptually seamless visual movement?The term "perceptual constancy" describes how perceived geometrical and physical properties of objects hold true despite changes to the objects, such as stiff motion.
The superior colliculus (SC) is a multimodal midbrain region that combines spatial information from the eyes, ears, and somatosensory system to cause the head and eyes to move in the direction of important things in space.
Therefore, Saccades is the term used to describe how your brain assembles the tiny movements of your eye into perceptually continuous visual movement.
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What is the purpose of a differential white blood cell count?
A differential white blood cell count (or differential WBC count) is a medical test that determines the different kinds of white blood cells in a blood sample.
The human body has five different kinds of white blood cells (WBCs): neutrophils, lymphocytes, monocytes, eosinophils, and basophils. The amount of immature white blood cells present in the body as well as the relative proportions of these five different kinds of WBCs are determined by the differential WBC count.
Leukemia, infections, and inflammatory disorders are just a few of the ailments and diseases that the test findings may be used to monitor and diagnose. It is also used to monitor therapeutic response and evaluate therapeutic effectiveness.
The differential WBC count is frequently conducted alongside other tests, such as a blood smear or a peripheral blood smear, a complete blood count (CBC), and the differential WBC count.
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1. Each kingdom can be divided into different domains.
True or False
2. A genus cannot contain members of different species True or False
3. Organisms can belong to the same class but different order True or false
Answer:
1...true
2...true
3...false
neutrophils remove invading microorganisms through a process called
Neutrophils remove invading microorganisms through the process called as Phagocytosis.
What are neutrophils?The ability of neutrophils to ingest and kill invading microbes is essential for the maintenance of the host health. Neutrophils remove bacterial and fungal pathogens through process which is known as phagocytosis.
Neutrophils capture and destroy invading microorganisms through phagocytosis and intracellular degradation, release of granules, and then formation of neutrophil extracellular traps after detecting pathogens.
When microorganisms, like bacteria or viruses, enter the body, then neutrophils are one of the first immune cells to respond.
Phagocytosis is the process by which certain living cells called phagocytes ingest/ engulf other cells or particles.
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This diagram orders biological systems from least complex (at the beginning) to most complex (at the end):
Population → Community → Ecosystem → Biome
Which systems include abiotic factors?
A.
Ecosystem and biome only
B.
Community and ecosystem only
C.
Population and community only
D.
Community, ecosystem, and biome only
Answer: A. Ecosystem and biome only
Explanation: Abiotic factors refer to non-living components of an ecosystem. These factors include things like temperature, sunlight, water, soil composition, and air quality.
An ecosystem is a community of living organisms interacting with their abiotic environment, which means it consists of both biotic (living) and abiotic (non-living) factors.
A biome, on the other hand, is a large geographical area characterized by a specific set of abiotic factors, such as climate and soil type. It includes multiple ecosystems within it.
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What is the site of photosynthesis in a animal cell?
Photosynthesis is a process that occurs in plant cells, not animal cells. Animal cells do not have the organelles called chloroplasts, which are necessary for photosynthesis to occur.
Chloroplasts contain the pigment chlorophyll, which absorbs sunlight and converts it into energy that can be used to create food for the plant cell.
Instead of photosynthesis, animal cells obtain energy by breaking down organic molecules through a process called cellular respiration. This process occurs in the mitochondria, which are organelles that are present in both plant and animal cells. During cellular respiration, glucose and other organic molecules are broken down to release energy, which is used to power the cell's metabolic processes.
In summary, photosynthesis occurs in plant cells and requires chloroplasts, while animal cells obtain energy through cellular respiration in the mitochondria.
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which of the following is an example of a generalized trait: group of answer choices hooves in horses wings in bats opposable thumbs in humans all of these
"Opposite thumbs in humans" is an occurrence of a generic attribute.
Explain about the generalized trait?A trait is a feature that is genetically determined in science. Some characteristics include green eyes or just being shorter than average.
A characteristic is a significant aspect of someone's personality and appearance in more generic usage.Generalization enables the student to use the lessons they've learned in class and put them into practise in their everyday surroundings. Generalization can be defined as the transfer of knowledge from specific parameters to so much broader ones, to put it simply.It is considered that a study has strong generalizability if its findings may be applied broadly to a wide range of individuals or circumstances. If the outcomes are only applicable to a very small population or a very particular circumstance.Thus, "Opposite thumbs in humans" is an occurrence of a generic attribute.
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macrophages that reside in tissues express several types of receptors that are broadly referred to as what types of receptors?
Two different types of receptors are expressed by macrophages in tissues. They are broadly referred to as phagocytic and signaling receptors, thus the correct option is B.
Macrophages are effector cells of the innate immune system that release both pro-inflammatory and antibacterial mediators in addition to phagocytosing microorganisms. Additionally, macrophages are crucial in the elimination of sick and damaged cells due to their programmed cell death. Typically, macrophages consume and break down foreign substances, tumor cells, debris, and dead cells. They assist the body in maintaining homeostasis by acting as phagocytes, trophic, regulatory, and repair cells in response to both internal and external disturbances.
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The complete question is:
Macrophages that reside in tissues express two types of receptors. They are broadly referred to as _______ and ______ receptors.
A) death; neutralizing
B) phagocytic; signaling
C) activating; inhibitory
Light vial at 5 cm at your last time check: What is the pH of the "no plant" vial? What is the pH ofthe "light vial" at 5 cm? 81 There should be difference in pH between these = two vials: Why is there difference? point) What was the purpose of the no plant" vial for this experiment? [Hint: this vial also acted as control" | point) The following ask you to compare the pH changes in the cm vial t0 the changes in the dark vial (aluminum foil vial) What is the pH of the "dark" vial? 718 Whac is the pH ofthe "light" vial at = cmn? 8,6
The pH of the "no plant" vial is 7.18 and the pH of the "light vial" at 5 cm is 8.6. There is a difference in pH between these two vials because light affects the growth and respiration of plants which releases CO2,
pH is a measure of the acidity or basicity of a solution. In this experiment, the pH of the vials containing plants was being monitored over time to determine the impact of light on the plants. The "no plant" vial acted as a control, as it allowed the experimenter to compare the changes in pH in the presence and absence of plants. The "light vial" at 5 cm had a pH of 8.6, while the "no plant" vial had a pH of 7.18. This difference in pH can be attributed to the fact that light affects the growth and respiration of plants, which releases CO2 into the solution and increases its acidity. On the other hand, the "dark" vial (aluminum foil vials ), which was not exposed to light, had a pH of 7.18, showing that light has a significant impact on the pH of the solution in the vial.
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What is the purpose of the enzymes in barley?
The primary purpose of enzymes in barley is to catalyze biochemical transformations in the grain to produce sugar, starches, and other compounds used in brewing and baking.
These enzymes are in charge of dissolving complicated proteins and carbohydrates into simple sugars and amino acids, which yeast may utilise to ferment and make alcohol.
Enzymes are also necessary for the conversion of starches into dextrins and maltose, which enables brewers to create various types of beer. Enzymes may also break down proteins into amino acids, which give finished beer its flavour and fragrance.
Lastly, enzymes are in charge of creating flavouring substances like glycerol, which gives beer its sweetness and full body.
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what does preformationism indicate about the way in which traits are inherited?
In short, preformationism is a theory that suggests that all of an organism's traits are inherited from one of its parents
Preformationism theory was popular in the 17th and 18th centuries but has since been discredited by modern genetics. According to preformationism, an organism's traits are determined entirely by the traits of one of its parents, and there is no blending or interaction between the traits of the two parents.
This theory is in contrast to the modern understanding of inheritance, which recognizes that traits are inherited from both parents and that there is often a complex interplay between different genes and environmental factors in determining an organism's traits.
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How do viruses reproduce lytic cycle?
One of the two cycles a virus might employ to proliferate inside a host cell is the lytic cycle. The lytic cycle is a sequence of steps in which a virus seizes control of a host cell, uses that cell's constituent parts to produce additional virus, kills and leaves the cell, and then spreads to other cells.
The six steps of the lytic replication cycle are typically described as follows:
A virus attaches itself to the outside of a host cell.
Injection entails injecting the virus's genetic material (either RNA or DNA) into the host cell through a newly formed hole in the cell membrane.
Integration - The virus's genetic material instructs the cell to build more of the virus.
Replication - Ribosomes within the host cell construct the virus's components.
The host cell assembles the components to form new copies of the virus.
Lysis - The cell bursts open, resulting in death and the release of more virus, which can now infect other cells. (The terms lysis and lytic are used.)
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this week for experiment 1b (week 3) you will be picking colonies from your yeast transformations from last week and streaking them onto both sd-leu and sd-leu-his plates. this will enable you to determine whether your colonies have become auxotrophic for histidine biosynthesis (i.e., whether they are his- mutants). from the five transformations you performed last week, which one do you predict will have the lowest frequency of his- mutants? justify your answer.
The lowest number frequency of transformants should result from transformations 1 and 2, as expected. This is due to the presence of these two DNA mixtures.
To determine which of the five yeast transformations from last week will have the lowest frequency of his- mutants without additional information. Factors such as the method used for transformation, the efficiency of transformation, and the presence of any selective pressure during growth can all impact the frequency of his- mutants. Additionally, without information about the specific strains or plasmids used in the transformations, it is impossible to make any predictions about the likelihood of obtaining his- mutants. It would be best to perform the streaking and phenotypic analysis in order to determine the frequency of his- mutants in each of the transformations.
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in appositional growth, chondrocytes within cartilage divide and secrete new matrix. true/flase
Answer: FALSE
Explanation:
why is changes in a song gene significant to speciation??
Even without genetic evolution of female preferences, given the diversity in vocalizations, the formation of song preferences through sexual imprinting may still lead to reproductive isolation.
What part do genes play in speciation?
When reproductive isolation between two or more populations emerges from alleles already existing in the shared ancestral population rather than through new mutations, this is known as standing genetic variation.
Therefore, there may be two ways that gene expression can support ecological speciation: either indirectly by encouraging population persistence or more directly by influencing adaptive genetic divergence in features that cause reproductive isolation. According to many widely recognized definitions of species, speciation is the process by which two genetically identical populations diverge to the point at which their continued fusion is impossible. Therefore, species are independent and genetically unique.
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If an increase in global temperatures causes parts of Alaska to remain snow free for two additional weeks each year, what affects might that have on earth? Describe 2-3 effects that may be seen on earth
There will be a decrease in the planet's albedo or reflectivity if interior Alaska remains snow-free.
What is albedo?
TThe ratio of a surface's radiosity (J) to its irradiance (Ee) (flux per unit area) is known as its albedo. The amount of solar radiation that reaches the Earth's surface and its spectral and angular distribution both influence how much of it is reflected. These variables change depending on the type of atmosphere, the location, and the time (see position of the Sun). Albedo is the directional integration of reflectance over all solar angles in a given period, as opposed to bi-hemispherical reflectance, which is calculated for a single angle of incidence (i.e., for a given position of the Sun). The temporal resolution can be measured in seconds (as determined by flux measurements) or as averages of a day, a month, or an entire year.To know more about albedo, click the link given below:
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What are two ways lysosomes can be activated?
Fusing with an old organelle or fusing with a food vesicle produced by phagocytosis are two ways lysosomes can be activated.
What are lysosomes?
An organelle of a cell that is membrane-bound and houses digestive enzymes is called a lysosome. Numerous cell processes involve lysosomes. They disassemble extra or worn-out cell components. They could be utilized to eliminate invasive bacteria and viruses. Lysosomes can assist a cell in self-destruction in a process known as programmed cell death, or apoptosis, if the damage is irreparable. Now, the lysosome is a particular kind of acidic organelle. Therefore, it must be shielded from the remainder of the cell's interior. The digestive enzymes that need to be stored in an acidic, low-pH environment are therefore kept in a compartment that has a membrane surrounding it. These enzymes, known as hydrolytic enzymes, convert big molecules into smaller ones.
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What made Went's experiment different from all previous experiments on plant tropism?
A. determine the chemical properties and structure of hormones that affect plant growth.
B. demonstrated that plants respond to indirect light by growing toward the light.
C. isolating a plant hormone from one plant and using it to change growth patterns in different plants.
D. showed that the coleoptile parts of plants are critical in responding to light signals.
Option C. Isolating a plant hormone from one plant and using it to change growth patterns in different plants made Went's experiment different from all previous experiments on plant tropism.
Went's experiment, also known as the Avena curvature experiment, was the first to demonstrate the existence of a plant hormone that regulates the growth of plants. In this experiment, Went isolated a substance from the tip of oat coleoptiles (the sheath protecting the embryonic shoot) that caused the coleoptiles to bend towards light. Went called this substance "auxin," which is now known to be the plant hormone responsible for regulating cell elongation and growth in response to various environmental stimuli. Previous experiments on plant tropism had observed plant growth responses to various stimuli, such as light and gravity, but had not identified a specific hormone or chemical that caused these responses. Went's experiment was the first to identify and isolate a specific plant hormone, and to demonstrate that this hormone could be used to induce similar growth responses in other plants. This discovery had a significant impact on the study of plant growth and development, and led to the development of new techniques for manipulating plant growth using synthetic auxins.
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