One classic experiment to verify how retinal axons find their appropriate targets is the "chiasm cutting" experiment.
In this experiment, the optic chiasm, a structure that connects the two optic nerves and is involved in the processing of visual information, is surgically cut in animal models.
As a result of this procedure, the axons from the nasal retina are unable to cross the midline of the brain, and instead project to the ipsilateral side of the brain, while the axons from the temporal retina continue to project to the contralateral side of the brain as normal.
This experimental manipulation provides direct evidence for the role of the optic chiasm in guiding axons from the nasal retina to their appropriate targets in the contralateral hemisphere and suggests the existence of molecular signals that guide axon growth and guidance during development.
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The final phase of an ecosystem after
completing repair from a disturbance is
referred to as a
community.
A. biodiversity
B. autotrophic
C. climax
Answer:
c
Explanation:
Succession. The final phase of an ecosystem after completing repair from a disturbance is referred to as a community is a Climax. This is the type of succession that occurs when the soil has been removed by significant event and has to be rebuilt.
The retinal optic disk is Group of answer choices a region within retina that has the best visual acuity. where the rods are most densely packed. where the cones are most densely packed. where axons leave the eye and join the optic nerve. where visual signals begin to diverge laterally.4
The retinal optic disk, also known as the blind spot, is a region within the retina where axons leave the eye and join the optic nerve.
This area is crucial for transmitting visual information from the eye to the brain. It's worth noting that the optic disk doesn't contain any rods or cones, which are the photoreceptor cells responsible for vision. Therefore, the optic disk is not where the best visual acuity, the highest concentration of rods, or the highest concentration of cones is found.
Additionally, the optic disk is not the location where visual signals begin to diverge laterally. Instead, it serves as a vital connection point for the optic nerve, allowing visual information to be relayed from the retina to the brain for interpretation and processing.
In conclusion, the retinal optic disk is an important structure in the eye, marking the beginning of the optic nerve and transmitting visual information to the brain. Its significance in visual processing and eye examinations highlights the importance of understanding its function and structure.
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How can pesticide use be harmful to human agriculture?
a.
The loss of beneficial microfauna can reduce soil productivity.
b.
Pesticides eliminate harmful insect pests.
c.
Pesticides target the elimination of beneficial soil microflora.
d.
The use of pesticides kills all soil microflora and microfauna
I'm going wit number a aaaaaaaaaaaaaaaaaaaaaaaaaAaaaaa
Answer:
a.
The loss of beneficial microfauna can reduce soil productivity.
Explanation:
Cancer is the uncontrolled growth of cells. Which of the following would be most likely to cause
cancer?
Group of answer choices
Mutations in regulatory proteins during the cell cycle may cause affected cells to divide uncontrollably.
Cells, which come in contact with cancerous cells, become cancerous themselves.
A bacterial infection modifies a cell, causing it to grow out of control.
During the synthesis stage, crossing over will cause cells to divide without inhibition
Answer:
Mutations in regulatory proteins during the cell cycle may cause affected cells to divide uncontrollably
Explanation:
Cancer is the uncontrolled growth of cells.
Which of the statements are correct?Mutations in regulatory proteins during the cell cycle may cause affected cells to divide uncontrollably.
What proteins regulate the cell cycle?There are some proteins that regulate the cell cycle that includes:
cyclinscyclin-dependent kinases (Cdks)What is cancer?An unregulated division of abnormal cells in an area of the body causes a disease.
What are the types of cancer?They are of 4 types:
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Why could tropical rain forests be called the "medicine chest of the Earth?
Type the correct answer in the box.
Spell all words correctly.
Where does the maximum absorption of alcohol take place in the human body?
After Ingestion of alcohol, it is first absorbed by the stomach. However, the maximum absorption happens in the ______
Reset
Next
Answer:
Explanation:
Once swallowed, a drink enters the stomach and small intestine, where small blood vessels carry it to the bloodstream. Approximately 20% of alcohol is absorbed through the stomach and most of the remaining 80% is absorbed through the small intestine. Hope It Helps
3. What is the purpose of having so many different kinds of proteins on the
surface of cells? How does the cell know how to make those proteins (where is
the "recipe") and how are those proteins made?
Answer: See Below
Explanation:
The proteins on the cells surface are vital for numerous cellular processes. They can be used to intake or export nutrients and waste. They can also be use for ligand-receptor binding for cell to cell signaling. Proteins on the surface also act to regulate gene expression based on all kinds of different environmental stimuli.
The recipe for these proteins are in the DNA of the cell. All of the cells in our body contain essentially the exact same DNA. Cells differentiate by various gene regulation mechanisms. Cells in our body will have different types of proteins depending on the type of cell that they are. Gene expression for these surface proteins is highly specific and is governed by various regulatory mechanisms such as activators and repressors.
If a surface protein is needed then it will be transcribed into mRNA and then translated into a protein and transported to its proper location within the cell membrane.
does cellular respiration requires nutrients or glucose?
Which birth factors place the neonate at risk for sudden infant death syndrome (sids)? select all that apply. one, some, or all responses may be correct.
Prematurity, low birth weight, and multiple births are recognized as birth factors that place the neonate at an increased risk for Sudden Infant Death Syndrome (SIDS).
Premature infants, who are born before 37 weeks of gestation, have underdeveloped physiological systems, including their respiratory and nervous systems, which may contribute to a higher vulnerability to Sudden Infant Death Syndrome (SIDS). Similarly, low birth weight infants, typically weighing less than 2,500 grams (5.5 pounds), may have underdeveloped organs and reduced physiological resilience. Multiple births, such as twins or triplets, may pose a higher risk due to the increased likelihood of premature birth and low birth weight. While these factors increase the risk, it is important to practice safe sleep habits and create a safe sleeping environment for all infants to mitigate the risk of SIDS.For more questions on Sudden Infant Death Syndrome:
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2.
Explain a strategy to find out how many of the living organisms are in the kingdom Animalia.
There are different strategies that scientists can use to determine the number of living organisms in the kingdom Animalia. A combination of these approaches can be used to obtain a more accurate estimate of the animal population.
Animalia kingdom includes all the animal species on the earth. Finding out the number of living organisms in the kingdom Animalia is a task that requires the assistance of advanced techniques and methods. Here are some of the strategies that can be used to find out the number of living organisms in the kingdom Animalia.
The first strategy is to carry out a survey of the animal population. The survey can be conducted on land, water, and air to determine the different types of animals that exist in these areas. This information can then be used to estimate the total population of animals in the kingdom Animalia. The second strategy is to use technology such as satellite imaging to locate areas with high animal density.
This can be achieved by monitoring the movement of animals in the wild and estimating their numbers based on the area they occupy. Finally, scientists can use mathematical models to predict the number of living organisms in the kingdom Animalia. This approach involves collecting data on the number of animals in specific regions and using statistical analysis to estimate the total population of animals in the world.
Therefore, there are different strategies that scientists can use to determine the number of living organisms in the kingdom Animalia. A combination of these approaches can be used to obtain a more accurate estimate of the animal population.
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Explain how the distance between genes affects the probability of crossover occurring.
Answer:
The probability of crossover occurring between two genes on a chromosome is inversely proportional to the distance between them.
This is because the process of crossover or recombination is more likely to occur between genes that are farther apart on a chromosome as there is a larger physical distance between them for the process to occur.
Conversely, genes that are closer together on a chromosome are less likely to undergo crossover as there is less physical space for recombination to occur.
Therefore, the probability of crossover between two genes on a chromosome can be used to estimate the relative position of those genes. Genes that have a higher probability of recombination between them are likely to be further apart on the chromosome compared to genes with a lower probability of recombination.
Explanation:
Acid rain contributes to all of the following problems except:
A.) Smog
B.) loss of biodiversity in aquatic ecosystems
C.) Damage to vegetation
D.) Advance chemical weathering
Answer:
Option A ( Smog ) .......
cassava roots are a good source of calories and are part of the human diet in many cultures. however, care must be taken to thoroughly peel and cook them. otherwise, the ingested root releases the toxin hydrogen cyanide when the roots are digested. this is an example of:
The toxin released by Cassava roots is an example of a chemical defense against herbivores.
Allelochemicals, secondary metabolites produced by many plants, have an impact on the behavior, growth, or survival of herbivores. Cassava is one such plant that releases the toxin hydrogen cyanide when the roots are digested.
Due to the toxins in the plants and tubers that are harmful to humans, processing cassava takes a long time before it can be eaten safely. These poisons are cyanogenic glucosides, which when tissues are crushed release cyanide gas. The compounds that contain cyanide are found in high concentrations in the leaves. They are then transported to the tubers, where they are likely to serve as a pest repellent, a nitrogen source for the roots, and a danger to herbivores.
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3
The human body contains both bones and muscles. Bones are rigid, but muscles can contract
and relax to move the body. What explains this difference in body structures?
(1 Point)
A. Muscles are made of animal cells, and bones are made of plant cells
B. Bones and muscles are made of different kinds of animal cells
C. Bones contain more cells than muscles
D. Muscle cells form tissues, but bone cells do not
Answer:
awts gegegegegegegegegegegege
What does bilateral lung transplantation mean?
Answer:
This is the transplant of both lungs
Explanation:
It’s also called bilateral single. Heart-lung transplant. This is the transplant of both lungs and the heart taken from a single donor. Most lungs that are transplanted come from deceased organ donors.
Answer:
"What is a bilateral lung transplant?
Having a bilateral lung transplant means having an operation to remove both of your diseased lungs. These lungs are replaced with healthy lungs from another human being."
Explanation:
Chemical reactions are essential to the life of a living organism.
Make a list of biological processes
that involve chemical reaction
Common examples of biological processes that involves chemical reactions are as follows:
PhotosynthesisCellular respirationWhat is a chemical reaction?A chemical reaction is typically a process that involves the breaking or making of interatomic bonds, in which one or more substances called reactants are changed into other substances called products.
Chemical reactions, as mentioned in this question, are essential to life, hence, cannot be overemphasized.
Specific chemical reactions that take place inside living organisms are termed biochemical reactions.
Some common examples of biological processes that involves chemical reactions are as follows:
Photosynthesis; which is the process whereby green plants manufacture their own food using light energy. Cellular respiration; which is the process whereby energy is synthesized as a result of the breakdown of organic substances.Learn more about chemical reaction at:https://brainly.com/question/22817140
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Katherine wants to investigate if the time of day a plant is watered affects the growth of the plant. She waters the same type of plants with the same amount of water at the same time in the morning. The plants are sitting in the same location and get the same amount of sunlight. Which variable is missing from the experiment?
A. Independent variable: plants should be watered at different times of the day
B. Dependent variable: experiment should use different types of plants
C. Independent variable: the amount of sunlight should change daily
D. Controlled variable: experiment should use the same amount of water
Answer:C
Explanation:
3 característica sostenibilidad energética
im hispanic but put it in english and then i could help you for sure i promise ill edit my answer and everything solo pongalo en ingles por favor
write a bibliography
Answer:
bibliography is a list of the books and other sources that are referred to in a scholarly work-such as an essay, term paper, dissertation, or a book. The bibliography comes at the end of the work.
Explanation:
FILL IN THE BLANK. after the centromeres separate during mitosis, the sister chromatids, now called _______, move toward opposite poles of the spindle.
After the centromeres separate during mitosis, the sister chromatids, now called daughter chromosomes, move towards the opposite poles of the spindle.
Mitosis is the process by which somatic cells divide to produce two genetically identical daughter cells. The different stages of mitosis are prophase, metaphase, anaphase, and telophase. During prophase, the chromosomes become condensed and visible, and the spindle begins to form.
The nuclear envelope begins to disintegrate, allowing the spindle fibres to attach to the kinetochores located at the centromeres of the chromosomes. During metaphase, the chromosomes align at the equatorial plate, the spindle fibers attach to the kinetochores at the centromeres, and the sister chromatids of each chromosome are under tension and ready to separate.
This is the phase where the chromosomes are located at the center of the spindle apparatus.During anaphase, the spindle fibers begin to shorten, pulling the sister chromatids apart towards opposite poles of the spindle. The sister chromatids are now referred to as daughter chromosomes.
During telophase, the daughter chromosomes reach their respective poles, and the nuclear envelope reforms around each set of chromosomes. Cytokinesis, the physical separation of the two daughter cells, occurs during telophase as well.
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The chromosome number in animas is kept the same from one generation to the next because of__.
Answer:
Mitosis
Explanation:
Mitosis is the process of cell division. In this process cells are split to create exact replicas of eachother. It is why we don't grow ears on our hands when they are injured. The hand cells are replicated to create more, so it heals correctly. In the Mitosis the two resulting daughter cells always have the same number of chromosomes from the parent cell. Their role is to maintain the same number of chromosomes in each cell division constant, which allows us to grow and self-maintain our bodies.
a botanist travels to an area that has experienced a long, severe drought. while examining the bryophytes in the area, he notices that many are in the same life-cycle stage. which life-cycle stage should be the most common?
The most common life-cycle stage that a botanist would likely observe in bryophytes after a long, severe drought is gametophyte. This is because in bryophytes, gametophytes are the dominant life-cycle stage in harsh environments with limited water availability. In these conditions, the sporophyte stage does not have the opportunity to develop and reproduce. .
To understand the life-cycle of bryophytes, it is important to first understand the differences between the sporophyte and gametophyte stages. The sporophyte stage is an asexual reproduction phase where a multicellular, haploid spore-producing structure develops on the gametophyte. The gametophyte stage is the sexual reproduction phase, where a multicellular, haploid structure develops and produces gametes (sperm and egg cells).
In harsher, drier conditions, the sporophyte stage has difficulty in developing and surviving due to limited water availability. As a result, the gametophyte stage has the advantage in that it is able to remain as the dominant life-cycle stage in such conditions. This is why the gametophyte stage is typically the most common after a long, severe drought.
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How could hiccups decrease your ability to continue exercising for a longer amount of time? Use at least the vocabulary words "fatigue" and "cellular respiration " in your response.
Answer:
Hiccups can decrease the ability to continue exercising for a longer amount of time due to the interruption of normal breathing patterns. When hiccups occur, the diaphragm contracts involuntarily, leading to a sudden intake of air. This interruption can cause fatigue in the respiratory muscles and decrease the efficiency of cellular respiration, leading to less oxygen being transported to the working muscles. This lack of oxygen can result in premature fatigue and decreased exercise performance. Additionally, the distraction and discomfort caused by hiccups can cause a decrease in motivation and focus, further impacting exercise ability.
Explanation:
As blood volume decreases, blood pressure ____________ . If greater than ____________ of the blood volume is lost from the blood vessels, the ____________ division of the autonomic nervous system (ANS) is activated, bringing about ____________ vasoconstriction of blood vessels, increased heart rate, and force of heart contraction in an attempt to maintain blood ____________ . These processes are effective in maintaining blood pressure until approximately _______
Explanation:
Decreases, 40%, Sympathetic, Increased, Pressure, 10%.
How many neutrons are in an element with 47 protons and a mass of 121?
Answer:
There are 61 neutons in the element, and the element is silver.
Select any part of the outer protective connective tissue layer surrounding the spinal cord. This layer is called the
The layer of the outer protective connective tissue surrounding the spinal cord is called the dura mater.
The layer of the outer protective connective tissue surrounding the spinal cord is called the dura mater. The dura mater is a thick, tough, and fibrous membrane that provides a strong protective barrier for the spinal cord. It is one of the three layers of the meninges, along with the arachnoid mater and the pia mater, that surround and support the central nervous system. The dura mater is a tough and durable membrane that forms the outermost layer of the meninges, which are the protective coverings of the brain and spinal cord. It acts as a protective barrier and helps maintain the shape and structure of the spinal cord.
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Root Words The root word of
the word codon is the word code.
Why does this root word make
sense?
Answer:
Explanation:
The reason why this root word makes sense is because the units used to code DNA are called codons. There is a unique protein for each codon used to compose the double helix of DNA.
a tumor contains 109 cells. after a dose of chemotherapy, there are 750,000 cells remaining. when the second chemotherapy dose is given, the tumor has grown to 800,000 cells. how many cells do you expect to remain after the next dose of chemotherapy?
The percentage of cells that were killed by the first chemotherapy dose and the percentage of cells that survived and grew back before the second dose.
The first dose killed \((109 - 750,000)/109 = 99.999%\) of the cells.
The second dose was given after the tumor grew to 800,000 cells, so it grew back by \((800,000 - 750,000)/750,000 = 0.0667\) or 6.67%.
Therefore, we can expect the next chemotherapy dose to kill approximately 93.33% of the remaining cells.
So, the estimated number of cells remaining after the next dose of chemotherapy would be \(800,000 * (1 - 0.9333) = 53,333.\)
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Similarities and between temperate grasslands and tropical grassland
Temperate grasslands and tropical grasslands (also known as savannas) share several similarities, including: Grasses, climate, biodiversity and agriculture.
What is the role of agriculture ?It is basic of any field thus we can say no food no life.
Grasses: Both types of grasslands are characterized by a dominance of grasses, with few trees or shrubs.
Climate: Both temperate and tropical grasslands are located in areas with a distinct dry season and receive limited rainfall throughout the year.
Biodiversity: Grasslands support a unique assemblage of wildlife, with many species adapted to living in open, grassy habitats.
Importance for agriculture: Both types of grasslands are important for agriculture, with many crops grown in these areas.
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Athletes training at high altitudes adapt to air with lower oxygen levels than air at sea level. Which cells are most likely to increase in number as a result of this adaptation?
A. neurons
B. red blood cells
C. white blood cells
D. muscle cells
Answer:
B. Red blood cells are most likely to increase