The study of neurospora mutants grown on various supplemented media supported the hypothesis that:______
Answers
The study of Neurospora mutants grown on various supplemented media supported the hypothesis that different nutritional requirements are determined by mutations in specific genes.
Neurospora is a model organism that has been extensively studied for its genetics and physiology. The mutants used in the study had mutations in genes that affect the biosynthesis of certain amino acids or vitamins.
hen grown on media that lacked these nutrients, the mutants could not grow, but grew normally when the nutrients were added to the media.This suggests that the mutations in the specific genes caused the loss of ability to synthesize certain nutrients, and the resulting phenotype could be rescued by providing the missing nutrients in the media.
Thus, the study supported the hypothesis that mutations in specific genes can lead to different nutritional requirements.
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Related Questions
What factors determine whether a species can be present in a place?
a. Climate and weather.
b. Food availability and competition.
c. Environmental conditions and habitat suitability. d. Reproductive behavior and migration patterns.
Answers
The interplay of factors like climate, weather, food availability and competition, environment conditions and habitat suitability, reproductive behavior, and migration patterns. determines whether a species can be present and sustain a population in a given place.
The presence of a species in a particular place is determined by various factors, including:
a. Climate and weather: Species have specific climate requirements, such as temperature and precipitation, which influence their ability to survive and thrive in a given area.
b. Food availability and competition: The availability of suitable food resources and the presence of competitors can impact a species' ability to establish and persist in a particular location.
c. Environmental conditions and habitat suitability: Species have specific environmental requirements, including factors like soil type, water availability, and vegetation, which determine whether an area provides a suitable habitat for their survival and reproduction.
d. Reproductive behavior and migration patterns: The reproductive behavior of a species, including mating rituals and breeding requirements, as well as migration patterns, can influence its presence in a specific place. Some species may require specific conditions or resources for successful reproduction or undertake seasonal migrations to find suitable habitats.
Overall, the interplay of factors like climate, weather, food availability and competition, environment conditions and habitat suitability, reproductive behavior, and migration patterns. determines whether a species can be present and sustain a population in a given place.
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How can we make larger drawings ? Can someone tell me the guidelines please help
Answers
Answer:
you should have skills of drawing observe the diagram
Answer:
by using a GRID to scale
Explanation:
step by step
Please hurry this is over due!
If you are correct I will give you all the points I possibly can and brainiest!
Which of these is NOT true about the outer core?
A) It is mostly made up of iron and nickel.
B) It is mostly liquid.
C) It has a higher temperature than the inner core.
D) Atoms within it form a powerful magnetic field.
Answers
Answer:
C. It has a higher temperature than the inner core
Explanation:
The inner core is higher in temperature then the outer core.
What determines the rate carbon moves through biotic and abiotic factors
Answers
The carbon cycle describes the way the element carbon moves between the Earth's biosphere, hydrosphere, atmosphere, and geosphere. It is important for a few reasons: Carbon is an essential element for all life, so understanding how it moves helps us to understand biological processes and factors that influence them.
Source: Google
Hope this helps you :)
describe one characteristic of a membrane that requires a channel be present for chloride ions to passively cross the membrane. explain why the movement of chloride ions out of intestinal cells leads to water loss.
Answers
One characteristic of a membrane that requires a channel for chloride ions to passively cross is its selective permeability.
Selective permeability allows specific molecules or ions to pass through the membrane while blocking others. Due to the charged nature of chloride ions, they cannot easily pass through the lipid bilayer of the membrane. Instead, they require channel proteins to facilitate their movement across the membrane.
The movement of chloride ions out of intestinal cells leads to water loss because it creates an osmotic gradient. When chloride ions move out of the cells, they increase the concentration of solutes in the extracellular space. This causes water to move out of the cells through osmosis to balance the concentration of solutes inside and outside the cell. This water loss can lead to dehydration if not properly regulated.
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name the two glands you found in the sheep brain. which one is found outise the dura mater
Answers
The two glands found in the sheep brain are the pituitary gland and the pineal gland. The pineal gland is found outside the dura mater.
The pituitary gland, also known as the "master gland", is a pea-sized gland located at the base of the brain that secretes hormones that regulate various bodily functions such as growth, reproduction, and metabolism. The pineal gland, located near the center of the brain, produces the hormone melatonin, which helps regulate sleep-wake cycles and other circadian rhythms. Unlike the pituitary gland, which is located within the protective bony structure of the skull, the pineal gland is located outside the dura mater, which is the outermost of the three layers of protective tissue surrounding the brain and spinal cord.
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HELP ME, PLEASEEEEE
Hypothesis- Written as an “If…then” statement.
If________________________________________, then_________________________
Answers
Answer:
A hypothesis is a proposed explanation for a phenomenon, typically written as an "if...then" statement. The "if" part of the statement describes the independent variable, which is the factor that is being manipulated or changed in the experiment. The "then" part of the statement describes the dependent variable, which is the factor that is being measured or observed in response to changes in the independent variable. For example, if I increase the amount of fertilizer given to plants (independent variable), then they will grow taller (dependent variable).
Answer: An example would be If acorns are removed from an environment then the squirrels would lessen in population
there are different states of matter and each has a distinct characteristics. if ever you'll compare yourself to these states, what would you be and why?
plss help me
Answers
Answer:
A human is a solid
Explanation:
We have a definite shape and higher density than liquid or gas
Fermentation allows energy to be removed from molecules
-under low pressure
-under anaerobic conditions
-under high pressure
-under aerobic conditions
Answers
Fermentation is a process that allows energy to be removed from molecules under anaerobic conditions.
This means that the process occurs without the presence of oxygen. During fermentation, molecules such as sugars are broken down into simpler compounds, such as alcohol or lactic acid, with the release of energy. This process is used by many organisms, including yeast and bacteria, to obtain energy in the absence of oxygen. The energy produced during fermentation is used for various metabolic processes, including muscle contraction and cell division. Fermentation can occur under low or high pressure, but the presence of oxygen inhibits this process. In summary, fermentation is an important process that allows energy to be extracted from molecules under anaerobic conditions, which is critical for the survival and growth of many organisms.
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why is the world round? it would be much better flat...? lol
Answers
Answer:
round is better then flat.
Explanation:
Bc, if it was flat it would eather be day or night all day.
If it was round the world dose not does not go in a circle or it would be flat.
Thats why the core of the wrld spins us not in a circle.
Which process do cells use to release energy without using oxygen?
•anaerobic respiration
•aerobic respiration
•mitosis
•photosynthesis
Answers
Answer:
The answer is anaerobic respiration
Explanation:
This process doesn't need any oxygen and produces 2 ATP.
In the ribonuclease experiments performed by Anfinsen, β-mercaptoethanol reduced:
a all bonds, and the unfolded protein molecules became tangled up with one another to form aggregates.
b incorrectly paired disulfide bonds, allowing them to reform with the correct pairing until the most stable conformation of the protein had been obtained.
c all incorrectly paired bonds and stabilized the protein structure.
d all bonds and destroyed the protein structure.
Answers
In the ribonuclease experiments performed by Anfinsen, β-mercaptoethanol reduced incorrectly paired disulfide bonds, allowing them to reform with the correct pairing until the most stable conformation of the protein had been obtained. So, option B is accurate.
In Anfinsen's ribonuclease experiments, β-mercaptoethanol was used to reduce disulfide bonds within the protein. Disulfide bonds are covalent bonds formed between two cysteine residues in a protein. When disulfide bonds are incorrectly paired or misfolded, they can lead to an unstable protein structure.
By adding β-mercaptoethanol, the mispaired disulfide bonds were reduced, breaking the incorrect bonds. This allowed the protein to refold and reform disulfide bonds in the correct pairing, gradually reaching the most stable conformation.
The purpose of these experiments was to demonstrate that the primary amino acid sequence of a protein contains the information necessary for its proper folding and formation of its native, functional structure. Anfinsen's work showed that even after denaturation, the correct folding of a protein can be achieved by allowing the disulfide bonds to form correctly.
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Which best defines a gene?
A. A gene is a unit of protein that contains the
genetic code.
B. A gene is a unit of DNA that contains code
for the creation of one protein.
C. A gene is a unit of DNA that contains the
code for the creation of amino acids.
D. none of the above
Answers
List and describe the function of 3 common proteins
Answers
Keratin is a structural protein that is found in your skin, hair and nails. Collagen is the most abundant protein in your body and is the structural protein of your bones, tendons, ligaments and skin. Elastin is several hundred times more flexible than collagen.
Explanation:
I tried
Drag the terms to their matching descriptions to review gene regulation in prokaryotes. (Note that not all terms have a match.) repression A gene fusion where the reulatory region of one gene is fused to the open reading frame of another gene whose protein product is easy to detect. allosteric protein A preferred sugar prevents transcription of a sugar-metabolizing operon. attenuation A protein that changes its conformation upon binding to another molecule, such as a repressor that binds to an inducer. operon Stimulation of transcription by a specific molecule. RNA leader sequence Prevention of gene expression by a specific protein that binds to an operator. catabolite repression A cluster of genes transcribed together into a single mRNA and regulated as a group. reporter gene reverse transcriptase Premature termination of transcription in response to translation of an RNA leader. constitutive mutant An untranslated region at the 5' end of a bacterial mRNA induction A strain that synthesizes certain enzymes regardless of environmental conditions. DNA polymerase
Answers
A regulator gene, regulator or control gene, is a gene involved in controlling the expression of one or more other genes. Regulatory sequences that encode regulatory genes are often located at her fifth end of the transcription start site of the genes they regulate.
Regulatory elements are sequences of DNA that are recognized and bound by specific transcription factors to recruit or exclude RNA polymerase. Promoters co-regulate gene transcription with nearby transcription factor-binding elements. Regulatory DNA sequences also encode important functions. They control when, where and how many genes are expressed. To do this, they encode 'landing pads', or binding sites for transcription factor proteins. Transcription factors recruit the molecular machinery that transcribes genes.
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Which defines a cell?
A. microscopic organism I in water
B. protein molecules in animals
C. the basic unit of living things
D. the smallest type of animal
Answers
Answer:
C
Explanation:
Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. ... Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.
cells. the smallest part of a living thing that can carry out the activities needed for life. organism. a living thing. organelle.
Forms when ice crystals reach the earth’s surface without passing through a liquid phase
Answers
Snow. Snow forms when ice crystals reach the earth’s surface without passing through a liquid phase.
Snow is a type of precipitation that occurs when water vapor in the atmosphere freezes into ice crystals. The shape and size of the snowflakes depend on the temperature and humidity of the air.
Snow can fall as light flakes, heavy flakes, or pellets. Snow can accumulate on the ground and form snowpacks, drifts, or avalanches. Snow can also melt and refreeze into ice or slush.
Some examples of snow-related topics are:
Snowflakes: the individual ice crystals that form snow. Snowflakes have a hexagonal symmetry and a variety of patterns. No two snowflakes are exactly alike.
Snowstorms: weather events that produce a large amount of snow in a short period of time. Snowstorms can cause low visibility, strong winds, and cold temperatures. Snowstorms can also create hazards such as power outages, traffic accidents, and frostbite. Some types of snowstorms are blizzards, nor'easters, and lake-effect snow.
Select the best answer for the question.
13. How does the principle of faunal succession assist the technique
O A. It creates unconformities in the rock layers.
O B. It accounts for the tectonic movement throughout history.
O C. It prioritizes parts before the whole appearance of organisms.
O D. Fossils appear in the strata in a specific order based on age.
Answers
Fossils appear in the strata in a specific order based on age. The correct option is D
What is the principle of faunal succession?Principle of faunal succession states that fossils appear in rock strata in a specific, predictable order based on the relative ages of the rock layers and the evolutionary relationships of the organisms represented by the fossils.
This principle allows geologists to use the relative ages of rocks and fossils to determine the relative age of other rocks and fossils in the same area and to establish a relative time scale for geologic events.
Therefore, By comparing the sequence of fossils in different rock strata, geologists can determine which strata are younger and which are older, and thus build a chronological framework for the Earth's history.
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Davion is in the clinic for a check up. At birth, you diagnosed him with Treacher-Collins Syndrome, a genetic disorder that affects the development of the bones and other tissues in the face. TCS is believed to be caused by a change in the gene on Chromosome 5, which affects facial development. About 40% of the time, one parent has Treacher Collins Syndrome. If the parents of the affected child are not affected by the syndrome, the chances of a sibling having Treacher Collins are minimal. Which organelle in the cell is responsible for Davion's inheritance of this genetic disease?
Answers
According to the research, the correct answer is ribosomes. The organelle in the cell that is responsible for Davion's inheritance of this genetic disease called Treacher-Collins Syndrome is ribosome.
What is Treacher-Collins Syndrome?It is a syndrome considered polyformative when multiple malformations are found, it has an abnormal craniofacial development pattern, and it is caused by a mutation of the chromosome that codes for the protein melasa.
In this sense, the protein melase is involved in ribosomal biogenesis, that is, it is involved in the transcription of the ribosomal DNA gene, as an important component of cell organelles called ribosomes, rRNA is essential for protein assembly.
Therefore, we can conclude that according to the research, Ribosome mutations of the protein melasa have been associated with Treacher Collins syndrome.
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PLEASE HELP!!!!
What are two ways that Nitrogen can get "fixed" to be used by plants
Answers
Answer:Nitrogen in its gaseous form (N2) can’t be used by most living things. It has to be converted or ‘fixed’ to a more usable form through a process called fixation. There are three ways nitrogen can be fixed to be useful for living things:
Biologically: Nitrogen gas (N2) diffuses into the soil from the atmosphere, and species of bacteria convert this nitrogen to ammonium ions (NH4+), which can be used by plants. Legumes (such as clover and lupins) are often grown by farmers because they have nodules on their roots that contain nitrogen-fixing bacteria. (Learn more about this process in the article The role of clover.)
Through lightning: Lightning converts atmospheric nitrogen into ammonia and nitrate (NO3) that enter soil with rainfall.
Industrially: People have learned how to convert nitrogen gas to ammonia (NH3-) and nitrogen-rich fertilisers to supplement the amount of nitrogen fixed naturally
Explanation:
Where is the DNA of a virus located?
A. the spindle fibers
B. the tail
C. the stem
D. the head
Answers
Answer:
D
Explanation:
Explanation: the dna of a virus is located in the nucleus which is located where you would call the head
Why does our sun appear to be bigger than all of the other stars?
A.The sun is much hotter than other stars.
B.The sun is the closest star to the earth.
C.The sun's color is yellow which is the brightest, most visible star.
D.As light travels from the other stars, it gets reflected.
Answers
Hope this helps (i can’t explain, because “B” is the explanation lol) :)
in a certain forest community, fallen trees and dead animals take longer than normal to release their nutrients back into the ecosystem. this community probably has a low population of
Answers
Fallen trees and dead animals in one forest community take longer than usual to discharge their nutrients back into the ecosystem. This community most likely has a small number of Decomposers.
Because nutrient recycling is the primary function of decomposers, a low number of decomposers will result in slow nutrient recycling.
Decomposers eat dead objects like leaf litter and timber, as well as animal carcasses and feces. As Earth's cleanup team, they provide a crucial service. Dead leaves, insects, and animals would build up everywhere if decomposers did not exist. Imagine what the world might look like!
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DNA is the genetic material that makes up living things, and folic acid plays an important role in the formation of DNA. Jon wants to study the effect of folic acid on DNA formation in microbes. Which statement accurately describe the variables in this study?
A.
The amount of folic acid and DNA synthesized are both dependent variables.
B.
The amount of folic acid and DNA synthesized are both independent variables.
C.
The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
D.
The amount of folic acid is the dependent variable, and the DNA synthesized is the independent variable.
E.
The amount of folic acid and DNA synthesized are neither dependent nor independent variables
Answers
Answer:
C
Explanation:
C:
Answer:
C
Explanation:
c
he cell-cell junctional structure that regulates the intercellular fluid transport between cells is:
Answers
Gap junctions in animal cells function similarly to plasmodesmata in plant cells in that they are channels between nearby cells that facilitate the passage of ions, water, and other substances. However, gap junctions and plasmodesmata are structurally distinct.
Cell junctions are required for communication with the cell's outside area. Cell junctions are classified into numerous types, including tight junctions, gap junctions, and desmosomes.
A tight junction is the junction that prevents fluid leakage between epithelial cells. Claudins and occludins are two proteins discovered that aid in the tightening of the cell-cell border.
These connections are present in epithelial cells in the skin and cavities. This sort of junction also governs water transport in epithelial cells. It serves as a physical barrier and aids in the regulation of cell polarity.
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Which cells are most likely to react in the event that there is a reduction in the supply of oxygen to a person’s foot? Select two options.
epithelial cells
neurons
muscle cells
red blood cells
liver cells
white blood cells
Answers
Answer: the answer for your question is muscle cells
Explanation:
Answer:
Epithelial cells and red blood cells
Explanation:
A certain type of mutation converts the base cytosine into uracil. If this mutation is not repaired when the DNA replicates, as shown in the diagram, which of the following changes is most likely to result?
Answers
The change that results is Uracil will base pair with adenine, resulting in a thymine-to-adenine base pair in the replicated DNA after DNA replication. Therefore, the correct option is B.
What is DNA replication?DNA replication is referred to as a biological process in which copies of DNA are formed which are termed as replicas during the cell division.
In the problem given here, we know that uracil normally pairs with adenine in RNA, and not in DNA, where thymine normally pairs with adenine. However, if uracil is present in DNA due to a mutation, it can base pair with adenine during DNA replication instead of the normal thymine-adenine base pair. This results in a cytosine-to-thymine base pair change in the replicated DNA, which is a common type of mutation. Therefore, the correct option is B.
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The question is incomplete, but most probably the complete question is,
A certain type of mutation converts the base cytosine into uracil. If this mutation is not repaired when the DNA replicates, as shown in the diagram, which of the following changes is most likely to result?
A. An uracil will be replaced with cytosine in the replicated DNA because uracil is in RNA and not DNA.
B. Uracil will base pair with adenine, resulting in a thymine-to-adenine base pair in the replicated DNA.
C. The DNA will become single stranded because uracil cannot base pair with adenine or guanine.
D. The DNA will no longer encode a protein because uracil is not recognized by ribosomes during protein synthesis.
How would the seasonal paths of the Sun change for a location that is more North of this latitude?
Answers
Answer:
At the North Pole, the sun is above the horizon for six straight months (March through September), spinning around in horizontal circles, reaching a maximum height of 23.5° above the horizon at the June solstice. As you travel southward in the northern hemisphere, the noon sun gets higher and higher.
Explanation:
Add the north pole the sun is above the horizontal for six straight months
Which of the following is a clue that a chemical change has taken place?
Answers
Answer:
During a chemical change, the composition of matter always changes. Four possible clues to chemical change include a transfer of energy, a change in color, the production of a gas, or the formation of a precipitate.
Explanation:
16. What is an enzyme?
Answers
Explanation:
Enzymes are proteins.They can catalyse different reactions they can be regulated in different ways with is very important to regulate the metabolism.Enzyms can catalyse different reactions bacause they have active center with help the molecules of the substrate to "meet each other" more easily and that lowers the the energy point needed for the reaction