The area of the retina that has no photoreceptors is the optic disc.
1. The retina is the light-sensitive tissue located at the back of the eye.
2. Photoreceptors are specialized cells in the retina responsible for converting light into electrical signals.
3. The macula is the central region of the retina, responsible for sharp central vision.
4. The fovea centralis is a small area within the macula that contains a high concentration of photoreceptors called cones, responsible for detailed and color vision.
5. The optic disc is the area where the optic nerve and blood vessels exit the eye; it lacks photoreceptors and is also known as the "blind spot."
So, the correct answer is a. optic disc.
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the evolutionary explanation for why humans are susceptible to choking is that evolution in all organisms is phylogenetically constrained by how adaptation happened in their ancestors. in particular, choking happens because:
Choking occurs because our ancestors faced selective pressures that shaped the anatomy and physiology of our respiratory and digestive systems, leading to vulnerabilities in the modern human body.
Choking is a consequence of the intricate relationship between the respiratory and digestive systems. The need to breathe and consume food simultaneously posed challenges for our ancestors, who were likely exposed to various environmental and dietary conditions. Over evolutionary time, the human body adapted to balance these requirements, but constraints from our past limit the effectiveness of these adaptations.
The structure of our throat, or pharynx, presents a potential vulnerability to choking. In humans, the pharynx serves as a shared passage for both air and food. While this design facilitates the efficient exchange of air and food, it also increases the risk of choking. The presence of a shared pathway means that there is a potential for food to obstruct the airway, especially if we eat too quickly, don't adequately chew our food, or consume improperly sized or shaped items.
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(a) Where is the plasma membrane located on an animal cell? _____ (b) All organelles have a specialized function. What is the function of the plasma membrane? _____
Answer:a) Where is the plasma membrane located on an animal cell?
Explanation:
you are working in a virology lab and help test incoming viral samples to determine the group of viruses to which they belong. viruses are characterized by their genome ds-dna, ss-dna, ds-rna, ss-rna (where ds stands for double stranded and ss for single stranded). 3 viruses have arrived for your analysis, eppstein-barr virus, a rotavirus, and an unknown virus from birds. you have analyzed the nucleic acid content as seen below. based on the data, what type of virus is each one (ds-dna, ss-dna, ds-rna, ss-rna; 3pts)?
what are genome of viruses?
Viruses typically have a single-stranded or double-stranded DNA or RNA genome, with sizes ranging from a few kilo bases to several hundred kilo bases. The genome can be linear or circular, and can encode anywhere from a few genes to several thousand genes. Depending on the virus, the genome can encode proteins involved in viral replication, proteins involved in viral structure, and proteins that are used to infect host cells.
The virus mentioned above with their genome are:
Epstein-Barr Virus: DS-DNA; Epstein-Barr Virus is a double stranded DNA virus that contains linear double stranded DNA.
Rotavirus: DS-RNA; Rotavirus is a double stranded RNA virus that contains 11 segments of double stranded RNA.
Unknown Virus from Birds: SS-RNA; The unknown virus from birds is most likely a single stranded RNA virus because most viruses from birds are RNA viruses, and single stranded RNA viruses are more common than double stranded RNA viruses.
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Explain why and how humans depend on photosynthesis for survival.
Help please! 3:46 4/5/2022 (American)
Answer:
because when plants do photosynthesis it take our co2 and gives us oxygen which we need to survive
Explain what
energy is
needed to
create
complex
sugars and
where did
the energy
come from?
All the energy we need for life comes from the foods we eat and the fluids we drink. These nutrients are broadly broken into fats, proteins, and carbohydrates. Carbohydrates play an especially important role as they provide the quick energy needed for exercise. Carbohydrates found in foods like grains, fruits, vegetables, beans, and dairy products are your body's favorite source of energy, but this is not the only role that carbs play. They also ensure mental sharpness and aid in the metabolism of fat for energy. Complex carbohydrates are an efficient source of energy that fuels muscle contractions. Once eaten, carbs are broken down into smaller sugars (glucose, fructose, and galactose) to be used as energy for immediate tasks. Any unused glucose will be converted into glycogen and stored in the muscles and liver for future use. Glycogen is the energy source most often used for short, intense bouts of exercise such as sprinting or weightlifting. Because glycogen is stored in muscles, it is immediately accessible. During bursts of activity, the stored glycogen will be converted back to glucose and burned for fuel. This is the typical energy source for the first few minutes of any sport.
A weakness or slight muscular paralysis is known as:
Answer:
paresis
Explanation:
refers to a condition in which muscle movement has become weakened or impaired. You may also sometimes see it referred to as “mild paralysis” or “partial paralysis.” Although paresis affects your muscles, it usually occurs due to nerve damage.
A weakness or slight muscular paralysis in any part of the body is known as the mild-paralysis or partial paralysis. This can be due to weakness, strokes or any injuries in the spinal cord.
What is Paralysis?Paresis is the condition which refers to the muscle movement when it has become weakened or impaired. It may sometimes also seen as “mild paralysis” or partial paralysis. It affects muscles mainly, however it usually occurs due to the nerve damage.
Hemiparesis is a slight weakness like mild loss of strength in a leg, an arm, or the face. It can also be paralysis on one side of the body. Hemiplegia is the severe or complete loss of strength or paralysis on one side of the body.
The different types of paralysis include quadriplegia, paraplegia, monoplegia, diplegia, and hemiplegia.
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How do your results demonstrate independent assortment?
Answer:
with your big toe treyyyyyy
Explanation:
the importance of stem cells is that they are differentiated and can become..
The importance of stem cells is that they are differentiated and can become daughter cells.
Why are stem cells important in differentiation?Stem cells have the potential to serve as the foundation of treatments for a wide range of illnesses due to their capacity to develop into almost any type of cell in the body. Standardized methods for stem cell cultivation and differentiation will be created as research advances.
In the body, stem cells have the capacity to differentiate into a wide variety of cell types. They act as the body's system for repairs. Adult stem cells and embryonic stem cells are the two primary categories of stem cells.
Therefore, one can say that daughter cells are created when stem cells divide properly in the body or a lab to create more cells. These daughter cells either differentiate into more stem cells or into cells with a more focused purpose.
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Explain the consequences of an increase of two degrees Fahrenheit.
Answer:I think it was The Heat waves can be dangerous, causing illnesses such as heat cramps and heat stroke, or even death. Warmer temperatures can also lead to a chain reaction of other changes around the world. That's because increasing air temperature also affects the oceans, weather patterns, snow and ice, and plants and animals
Explanation:
hope this helps have a nice night ❤️❤️❤️
Phytoplankton
strainer
Seaweed
Aquatic Food Web
Sea Lice
Crab
Lobster
Fish
Seagull
A proposed answer to a scientific problem is a _.
*Hypothesis
*Experiment
*Conclusion
*Theory
it is called as hypothesis
what could be a reason for the rising prices of petrol and diesel?
Answer:
Fuel manufacturing is not immune to inflation. The refining sector is facing the same supply chain shortages, higher feedstock prices, increased labor costs and higher “costs of everything” that are plaguing the wider economy—all of which add to the final price of diesel.
Explanation:
hope it helps.
Invasive species, deforestation, and eutrophication are all types of. Question 1 options:
Natural (nature-made) environmental changes
Man-made environmental changes
Both nature and man-made
Neither nature nor man-made
Answer:
B. Man-made environmental changes
Explanation:
Invasive species become what they are because of human interference. People bring animals into new habitats in which it's predators do not live, therefore, that animal can freely feed and overpopulate without anything to keep it under control.
Deforestation is also caused by human interference. We cut down trees for logging, paper, building etc.
Lastly, eutrophication. Eutrophication can be caused by natural occurences, but can also be caused by human actions. Because we are looking for a category to fit all of the things listed, it can be classified as a man-made environmental change. Eutrophication is predominantly caused by human actions due to their dependence on using nitrate and phosphate fertilizers.
25 POINTS!! i keep getting bots this is the last time someone actually answer please
A normal body cell of a coyote has 78 chromosomes in its nucleus. What are the diploid (2N) and haploid (N) numbers of the coyote? How many chromosomes would be in each coyote gamete?
Answer:
39, 78 I think I'm so sorry if I'm wrong
The the diploid (2N) have 78 chromosomes and haploid (N) will have 39 chromosomes in the coyote.
What is diploid and haploid?A cell with a single set of chromosomes is referred to as haploid. The term haploid can also refer to the number of chromosomes in gametes, which are egg or sperm cells.
A diploid cell is one that has two copies of each chromosome. Each chromosome is carried by nearly all cells in the human body in two homologous, or similar, copies.
The only exception are germ line cells, which produce gametes, or egg and sperm cells.
A normal coyote body cell has 78 chromosomes in its nucleus, a diploid (2N) has 78 chromosomes, and a haploid (N) has 39 chromosomes.
Thus, the chromosomes in each coyote gamete will be 78 in diploid cell and 39 in haploid cell.
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ALOT OF POINTS MARKING PEOPLE AS BRAINLIST
1. Which of the following is a characteristic associated with an organism's niche but not with its habitat?
a climate
b . soil quality
c. place in the food web
d.location within the ecosystem
Answer: it most likely c
Explanation:
Can someone explain the summary for consequences
Admittedly we have sinned, but how serious is our sin?
If we break human laws, that has certain consequences.
What about God's law? The Bible says, "The wages of
sin is death" (Romans 6:23). This is speaking of spiritual
death. If physical death is separation of the soul from
the body, spiritual death would be separation of the
soul from God, a separation that carries with it fearful
consequences.
Notice it does not say "the wages of great sin is death" -
- but just "sin!" That's shattering! Actually, since we
have broken the very first and great commandment
about loving God with all our heart, we are great
sinners! You have sinned and I have sinned, and the
wages of our sin is death. That "death" means our
condition before God is terminal, a dreadful, final
separation. Is there any escape from such
condemnation? Is there any way we can get God to
forgive us for our sin?
Answer: Honestly I don't bother with such things.
Explanation: While I admit myself if i were going by the rules of the bible i would be a sinner like no other. BUt i am not a bad person, i have not done anything bad in sort, i mean i never even kissed a girl at almost adulthood now. But that bieng said I know i could never make up for all the "bad things I have done". But who says there is someone watching us? Even if there is nothing to stop us, we keep moving on like there is a "god". I belive there is too much to this topic and alot is quite unclear. I have an email if you'd like to go further in detail with things. Sorry if this wasn't what you were looking for.
Which of the following is an example of the endocrine system directly interacting with the nervous system?
A. The vertebra protect the spinal cord from injury.
B. Hormones provide feedback that affects neural processing.
C. Sensory receptors in bones send signals about body position to the brain.
D. The brain sends signals that control the speed at which food moves through the intestines.
Answer:
B
Explanation: The endocrine system secretes hormones into blood and other body fluids. Hormones provide feedback to the brain to affect neural processing. Reproductive hormones affect the development of the nervous system. The hypothalamus controls the pituitary gland and other endocrine glands.
definition of photosynthesis in 200 words?
Photosynthesis is a process used by plants, algae, and some bacteria to produce glucose, which is a type of sugar.
In this process, they use energy from sunlight, carbon dioxide (CO2) from the air, and water (H2O) to produce glucose (C6H12O6) and oxygen (O2).
The photosynthesis process takes place in the chloroplasts of plant cells, which contain chlorophyll, a green pigment that absorbs light energy.
The energy absorbed by the chlorophyll is used to convert carbon dioxide and water into glucose and oxygen.
Photosynthesis can be divided into two main stages: the light-dependent reactions and the light-independent reactions.
During the light-dependent reactions, the absorbed light energy is used to produce ATP, a molecule that provides energy for the light-independent reactions.
Oxygen is also produced during this stage.
During the light-independent reactions, the energy stored in ATP is used to convert carbon dioxide into glucose.
This stage does not require light, but it is dependent on the products of the light-dependent reactions.
In summary, photosynthesis is a process used by plants, algae, and some bacteria to produce glucose and oxygen from carbon dioxide, water, and sunlight.
This process is essential for the survival of plants and is also important for the production of oxygen in the atmosphere.
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a virus mutates, and therefore it has which of the following traits of living things?(1 point) responses it uses energy. it uses energy. it is made of cells. it is made of cells. it evolves. it evolves. it grows and develops.
A virus mutates and evolves,which is the trait of a living being
What is a virus?
A host is required for the growth of viruses, which are microscopic infectious organisms that contain genetic material, either DNA or RNA.
Viruses are living organisms that can only survive and grow in a host, which is a living thing like a person, an animal, or a plant. Like cell-based life, viruses are subject to evolution and natural selection, and the majority of them change quickly mimicking living cells have led to numerous outbreaks of illness and fatalities throughout human history.
Therefore the virus evolves like a living being
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Short Answer
4. What role do marine laboratories play in the field of marine science?
Answer:
Explanation:
Marine laboratories allow marine biologists to keep organisms alive and to work over long periods of time. They also may have state-of-the-art equipment for conducting scientific research or they may be simple field stations that provide a base for scientists who work in remote areas.
Marine laboratories allow to keep marine organism for a longer period and allow to do research on them by marine biologists.
What is marine biology ?The field of study of marine organisms, their behaviors and interactions with the surrounding called as marine biology.
The marine biologist understand the marine species by studying the biological oceanography and their associated chemical, physical, and geological components.
It is a broad are in the research field, one has to have a particular are a interest.
Researchers apply particular molecular techniques in coastal areas to the deep sea and to various organisms such as viruses, plants, and fish.
The advantage of marine biology is to look oceans to help sustain our basic needs such as food, water and shelter.
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about 12,000 years ago climate conditions were changing and humans spent more time fishing and collecting plant foods. the big game animals were less numerous and hunting became more a solitary activity. this new way of life marks the beginning of the:
Hunting and other new ways of life mark the mesolithic age.
Give a brief description of the mesolithic age.
Between the Upper Paleolithic and the Neolithic is the Old World archaeological period known as the Mesolithic or Middle Stone Age. Particularly outside of northern Europe and for the equivalent time in the Levant and Caucasus, the word "Epipaleolithic" is frequently used synonymously.
Smaller chipped stone tools replaced larger chipped stone stools as the preferred seating option (microliths). Hunting big herds of animals in packs gave way to a more hunter-gatherer way of life. As the Mesolithic Age came to a conclusion, people started cultivating crops and engaging in animal husbandry, which is the controlled raising of domestic animals for food and other purposes. The Mesolithic Age saw the production of a variety of pottery in some parts of the world. The dogs were domesticated during the Mesolithic Age.
Hence, the answer is the mesolithic age.
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Name of a similar drug that would have the same effect as longmasterol?
Alternative medicine includes a broad variety of therapeutic techniques that are not deemed traditional by the medical community, such as homoeopathy, plant therapies, naturopathy, chiropractic, acupuncture, and others. Some of these treatments are now recognised as being beneficial in certain circumstances. From July to September 2010, the ISMP MERP received reports of unclear medication names. Valtrex (valACYclovir) and Valcyte are both antiviral medications (valGANciclovir). The generic names for these two drugs are remarkably identical, and both the brand and generic names begin with the prefix "val," adding to the appearance and sound-alike confusion.
Methylphenidate short-acting medicines are found in the following strengths: Substance Potency Ritalin 5 mg, 10 mg, and 20 mg, Ritalin SR 20 mg, and methylphenidate 5 mg, 10 mg, and 20 mg.
Doctors prefer to give long-acting stimulants and supplement with a short-acting medication if the long-acting drug's impact goes off. Dextro-methylphenidate is a methylphenidate variant found in Focalin and Focalin XR. This methylphenidate variant is more potent than its standard cousin.
When during meiosis does crossing over happen?
Answer:
prophase
Crossing over occurs during prophase I of meiosis before tetrads are aligned along the equator in metaphase I. By meiosis II, only sister chromatids remain and homologous chromosomes have been moved to separate cells. Recall that the point of crossing over is to increase genetic diversity.
Explanation:
:)
Who were the representatives
sent to work on the deal?
Answer:
Peace Negotiations
After Yorktown, the Continental Congress appointed a small group of statesmen to travel to Europe and negotiate a peace treaty with the British: John Adams, Benjamin Franklin, John Jay, Thomas Jefferson and Henry Laurens.
Plant hormones serve as chemical messengers between cells and tissues. Auxin is a plant hormone that causes the cells on the shady side of a plant shoot to elongate. The response enabled by auxin is known as —
F geotropism
G transpiration
H phototropism
J photosynthesis
Plant hormones serve as chemical messengers between cells and tissues. Auxin is a plant hormone that causes the cells on the shady side of a plant shoot to elongate. The response enabled by auxin is known a H. phototropism
Phototropism is a crucial process that enables plants to optimize their exposure to sunlight, which in turn, promotes photosynthesis and overall growth. This is different from geotropism (option F), which is the response of a plant to gravity, transpiration (option G), which is the process of water movement through a plant and its evaporation, and photosynthesis (option J), which is the process by which plants convert light energy into chemical energy to fuel their growth.
Auxin is a plant hormone that plays a vital role in the growth and development of plants. Specifically, auxin causes the cells on the shady side of a plant shoot to elongate, allowing the plant to grow towards the light source. In summary, auxin is a key plant hormone that facilitates phototropism, allowing plants to grow towards light and maximize their exposure for optimal growth.
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23) which of the following best describes genotypes and phenotypes? a) a trait that is expressed such as eye color is the phenotype and the gene responsible for eye color is the genotype. b) a person's genotypes often change during their lifetime, but their phenotypes typically do not. c) a person's genotypes and phenotypes are typically unchanging during their lifetime. d) a person's genotypes and phenotypes often both change during their lifetime.
A trait that is expressed such as eye color is the phenotype and the gene responsible for eye color is the genotype. The correct option is A
What is trait ?
A trait is an attribute or property of an organism that is influenced by its environment and/or genes.
The genetic make-up of an organism, including all of its inherited genes or alleles, is referred to as its genotype. The observable physical and behavioral characteristics of an organism, which are impacted by both its genotype and environmental influences, are referred to as phenotype.
For instance, an individual's genotype is made up of the genes responsible for traits like eye color. The phenotypic is the measurable physical characteristic of eye color whether it be blue, green, or brown.
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haloperidol is a drug that interferes with the transmission of dopamine among neurons. what effect would it probably have on someone who is suffering
It would exacerbate the symptoms.The drug haloperidol treats schizophrenia by acting on the brain.
Haloperidol causes no change in dopamine level, a minor rise in extracellular dopamine, a slightly bigger rise in extracellular DOPAC, a greater increase in tissue DOPAC, and a significant increase in the rate of dopamine synthesis.It would exacerbate the symptoms. The drug haloperidol treats schizophrenia by acting on the brain. It is often referred to as a conventional antipsychotic or the first generation antipsychotic (FGA). Dopamine is balanced again by haloperidol, which enhances cognition, mood, and behaviour. Aggression, delusions, and hallucinations are reduced, and it has a relaxing effect. The long-term treatment of psychotic diseases like schizophrenia involves the use of haloperidol. Additionally, it is utilised in the short term to treat extreme anxiety and violent, risky, or disturbed behaviour.
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Where does sugar enter the blood
Answer:
The intestines
Explanation:
The stomach breaks down sugar into glucose, which is then absorbed in the intestines and is released into the bloodstream.
One impact of climate change has been the loss of ice sheets in Antarctica and Greenland, resulting in a rise in global sea levels. Which of these describes a potential way this could directly influence human activity?
Answer:
Impact of Climate Change (Global Warming) - glacier melting & global see level rise : influence on human activity
Explanation:
Extreme Flooding - High sea levels imply more inflow into other water bodies like rivers, lakes etc Biodiversity Loss - Many organisms can continue their existence only on extremely cold glaciers - eg (blue bear)Further accelerated global warming - Glaciers have important role in absorbing earth heat, maintaining its coolness. Their melting leads to further global warming. Scarcity of freshwater - Glaciers & snow (salty) water cant be consumed. Increase in this water has reduced proportionality of freshwater that can be consumedhow to calculate the mean rate of respiration of maggots in mm per min
Answer:
To calculate the mean rate of respiration of maggots in mm per min, you will need to measure the oxygen consumption of the maggots over a certain period of time. You can do this by using a respirometer, which is a device that measures the amount of oxygen being consumed. Once you have the oxygen consumption rate, you can calculate the mean rate of respiration by dividing the oxygen consumption rate by the number of maggots used in the experiment. mL/min/maggot.
Explanation:
For example, if you had 10 maggots and they consumed 10 mL of oxygen over 60 minutes, then the mean rate of respiration would be 10 mL/10 maggots/60 minutes = 0.17 mL/min/maggot.