Answer:
C) bottleneck
The complete question is:
A flood kills most of the ants that live near a river. After the flood, the ant population increases, but its allele frequency is different. What type of situation is this?
a. genetic drift
b. mass extinction
c. bottleneck
d. founder
Explanation:
There are two most common forms of DNA drift:
Genetic drift is a naturally occurring shift in the frequency of an allele. In contrast, a bottleneck effect occurs when the population decreases rapidly. A flood reduced the ant population in this region, demonstrating a bottleneck effect that results in genetic drift.
Over time, this might alter a population's genetic makeup, making them more vulnerable to environmental hazards or illnesses. The flood significantly impacted the ant population. The abrupt decline in population due to the bottleneck effect may have genetic repercussions.
The situation described in the question, where a flood kills most of the ant population near a river, and the allele frequency in the population changes afterward, is an example of the bottleneck effect.
Event Occurs: A flood, which is a natural disaster, randomly reduces the ant population near the river. This sudden decrease in population size is what initiates the bottleneck effect.
Random Sampling: The surviving ants are a random sampling of the original population. This means that the survival of these ants is not necessarily related to their genetic traits but more related to chance.
Change in Gene Pool: The alleles (different versions of a gene) carried by the surviving ants become the entire genetic pool for the post-flood population. Since these surviving ants may not be genetically representative of the original population, the allele frequencies can change significantly.
New Allele Frequency: The new population will have different allele frequencies compared to the original population. Some alleles might be lost completely, while others may become more common.
Genetic Drift: The small population of surviving ants is then subject to genetic drift, which can further alter allele frequencies randomly over time, potentially reducing genetic diversity even more.
Which of the following statements regarding nonspecific immune responses is correct? A. A nonspecific immune response is the body's first line of defense against invaders. B. The influenza vaccine provides immunity by triggering nonspecific immune responses. C. Nonspecific immune responses involve the use of B and T lymphocytes. D. all of these
The correct answer is option A.
The immune system safeguards the body against the probable harmful materials by reacting and determining the antigens. Antigens are the components situated on the surface of viruses, cells, bacteria, or fungi. The immune system destructs and determines, or attempts to destroy the components, which comprise antigens.
Nonspecific or innate immunity is the defense system with which an individual is born. It safeguards the person against all the antigens. Innate immunity includes barriers, which keep the harmful substances from getting inside the body. These barriers make the first line of defense in the immune reaction.
A scientist wants to study photosynthesis in a newly discovered species. Which of these cell strict should the scientist study ?
A-vacuoles
B-chloroplasts
C-mitochondria
D-ribosomes
Match each hormone with the description of what would happen if it was absent in a pubescent male. not all labels will be used.
Which characteristic do euglenoids and algae share
Answer: The answer is B. please mark me as brainliest
Explanation: I took the test
The fluid mosaic model describes the___.
A.organization of organelles in cytoplasm
B.cell membrane
C.movement of carbohydrates in and out of the cell
D.extracellular matrix
Answer:
The correct answer is B.cell membrane
Explanation:
The fluid mosaic model describes the mosaic nature of the cell membrane. Fluid mosaic modal signifies that the plasma membrane is made up of lipid bilayer which is not fully rigid and gives fluidity to its membrane.
Due to this fluidity, components of the plasma membrane, like various plasma membrane proteins move freely in the membranes. This elasticity of the plasma membrane allows some proteins to do flip-flop movement.
These movements of plasma membrane components play important role in the cell signaling and transport of molecules across the cell. Therefore the correct answer is B.cell membrane.
An adolescent growth spurt occurs only in boys.
a. True
b. False
The correct answer is B. False
Explanation:
In development, a growth spurt refers to a period of time in which individuals experience rapid growth or development. In the case of an adolescent growth spurt, this is a natural process that occurs to all individuals including boys and girls during puberty. This takes place because during adolescence the hormone levels change and this leads to rapid growth as well as development or maturation of bones, muscle and the sexual or reproductive system. According to this, it is false an adolescent growth spurt occurs only in boys because this is a natural process that occurs on both girls and boys.
What is one way in which the lymphatic system works together with the immune system?
Answer:
Lymphatic system serves as site for production and maturation of lymphocytes.
Explanation:
Primary lymphoid organs of lymphatic system serves as site for production and maturation of lymphocytes which differentiate into B and T lymphocytes. Lymphatic system serves as first line of defense against infections since it transports antibodies, lymphocytes and pathogen along with lymph. Lymphocytes encounter the pathogens in secondary lymphoid tissues and proliferate to become actively involved cells. Spleen serves to filter the blood and presents the pathogens to lymphocytes and macrophages which in turn kill the pathogens.
What is one of the most effective ways to stop invasive animal species from entering the Great Lakes ecosystem?
Answer:
The correct answer is - cleaning ballast water.
Explanation:
In the great lakes, 65% of the invasive species come from the ships that carry ballast water tanks to stabilize them on the long route journeys, this release invasive species when loading and unloading cargo.
Cleaning up these ballast water is one of the most effective ways to stop the new invasive to enter the Great Lakes.
If the sequence of a nontemplate strand of dna is 5'-accgcatccgagtcac-3' what is the sequence of the transcript?
Infants need fat because it aids in absorption of several vitamins and also helps the ______________ to develop.nervous systemkidneysskinreproductive system
Answer: nervous system
Infants need fat as aid in absorption of several vitamins. IT also helps the brain or the nervous system to develop normally. Fats insulate all nervous system tissues in the body. Getting enough of this help infants feel full. It is also essential for growth and development.
In opsonization, antigens that are coated with antibodies are susceptible to
Out of the following given choices;
A. Further antibody attack.
B. Phagocytosis
C. Helper T cells
D. B cells.
E. None of the above.
The answer is B. Phagocytises is the engulfment of a particle from the external environment, by a cell, for ingestion. This is especially critical for the function of macrophages, which are immune cells. These macrophages have receptors for the Fc region of the immunoglobulin on their cell membrane surface.
When sedimentary rock is undisturbed , what is the relationship of the top layer and bottom layer
Answer:
The Top Layer Is Older Than The Botton Layer
Explanation:
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What is parallel editing?
a. the cutting together of two or more shots of the same character as he or she moves across space.
b. the cutting together of two or more shots that signals a long passage of time.
c. the cutting together of two or more lines of action that occur simultaneously at different locations.
d. the cutting together of two or more shots that have nothing explicitly to do with one another.
e. the cutting together of two or more shots that link eye-lines?
Answer:
The correct option is C.
Explanation:
Parallel editing refers to the method of alternating two or more scenes that occur simultaneously at different locations in a video. This technique is also known as cross cutting. The method is one of the methods that video editors used to edit videos of cinemas and films. Parallel editing can also be used to add suspense and pacing to an unfolding film.
In which kingdom are an overwhelming majority of its individuals producers? A) Animalia B) Fungi C) Insecta D) Plantae
The most widespread pollutant that can cause long-term lung damage is:
Which nutrients contribute most of the energy needed for physical activity -?
Enzymes
A) are composed of long chains of fatty acids
B) can be destroyed by variations in temperature or pH
C) are used up, in the process of performing a chemical reaction
D) raise the amount of energy required to start a chemical reaction
Enzymes are not destroyed by temperature or pH variations; they can be denatured, making them inactive. These proteins act as catalysts, lowering the activation energy of reactions without being consumed in the process.
Explanation:The correct answer to which of the following is not true about enzymes is option B) can be destroyed by variations in temperature or pH. Enzymes are not destroyed; they can be denatured or lose their functional shape due to extreme temperatures or pH levels. The denaturation renders them less effective or inactive, but it is a physical change, not a destruction. Enzymes are usually proteins made up of amino acid chains and serve as biocatalysts that accelerate biochemical reactions by specifically lowering the activation energy required for a reaction to proceed. Enzymes are not consumed in the reactions they catalyze; instead, they remain unchanged by the reaction and can be used repeatedly. Lastly, enzymes do not raise the energy requirement for a chemical reaction; instead, they lower it, thus enhancing the reaction rate without being used up.
An_____ is an immunity-producing substance formed from weak, dead, or parts of viruses or bacteria
The oceanic zone is _____. mostly photic mostly aphotic mostly benthic
The oceanic zone is mostly aphotic.
Photic zone is the part of the ocean where the light penetrates the depth and gets scattered in the water. This zone makes up a small part of the ocean ecosystem as light penetrates only for a few meters of depth. After this depth the aphotic zone begins where there is absence of light.
Benthic zone is the floor of the ocean where the shelled and aphotic deep sea animals live.
The oceanic zone here is mostly aphotic, lacking sufficient light for photosynthesis.
The oceanic zone is mostly aphotic, meaning it lacks sufficient light for photosynthesis.
Within the ocean, the photic zone is the portion where light can penetrate, and it extends to a depth of approximately 200 meters.
At depths greater than 200 meters, light cannot penetrate, and this is referred to as the aphotic zone.
The majority of the ocean is aphotic and mostly devoid of light.
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When you exhale, air passes through the respiratory structures in which order? A) alveolus, trachea, bronchus, bronchiole, larynx, pharynx, nasal cavity B) alveolus, bronchus, bronchiole, trachea, larynx, pharynx, nasal cavity C) alveolus, bronchiole, bronchus, trachea, larynx, pharynx, nasal cavity D) alveolus, trachea, bronchus, bronchiole, pharynx, larynx, nasal cavity
Exhale (breathe out) is the reverse process of inhaling (breathe in). Thus, the air goes through the bronchioles, out the bronchi, out the trachea, larynx, pharynx and finally out through your mouth and nose. Exhaled air contains wastes and carbon dioxide and it's warm.
Answer:
c
Explanation:
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A puggle is a type of dog first produced by mating two other types of dog a pug and a beagle what is that process
The process of mating two different breeds of dogs to create a new breed is called crossbreeding or designer breeding. The characteristics of the resulting puppies can vary depending on the genetic traits inherited from each parent breed.
What is Crossbreeding?Crossbreeding is the deliberate breeding of two different breeds of dogs to create offspring that possess desirable traits from both parent breeds.
The goal of crossbreeding is to produce a new breed that has the desirable traits of both parent breeds, such as appearance, temperament, or working ability.
In the case of a puggle, which is a mix of a pug and a beagle, the breeding process involves mating a purebred pug with a purebred beagle to produce a litter of hybrid puppies that inherit traits from both parent breeds.
It's important to note that while crossbreeding can be a way to create a unique and desirable breed, it is also controversial and has faced criticism from some animal welfare advocates.
Crossbreeding can lead to a variety of health problems, particularly when the parents have significant differences in size or structure.
Therefore, responsible breeding practices are important to ensure the health and well-being of the parent dogs and their offspring.
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The production of a puggle from mating a pug and a beagle is known as intentional breeding or artificial selection. Similar to how a cockapoo is bred from a poodle and a cocker spaniel, this process involves selecting parents with desirable traits. It is a human-driven practice that has led to a wide variety of dog breeds.
When a puggle is created by mating a pug and a beagle, it is an example of intentional breeding or artificial selection. This process involves choosing two different breeds with desirable traits to produce a new breed that exhibits a combination of these traits. Similarly, the breeding of a poodle and a cocker spaniel results in a breed known as the cockapoo.
This form of breeding occurs when humans intervene in the selection process, which has been practiced throughout history to create an array of domesticated animals with certain characteristics. While different dog breeds can interbreed to create hybrid dogs like the puggle and cockapoo, it's important to note that different species, such as the bald eagle and African fish eagle, may produce infertile hybrids due to incompatible genes that control development.
The creation of different dog breeds has largely been influenced by human activity, particularly through kennel clubs and dog shows which began in Victorian England. The American Kennel Club (AKC) continues to recognize new breeds, demonstrating the ongoing evolution and development of dog breeds under human influence.
Within any large animal population, there is _______ a variety of traits. And between different animal populations, there is _______ a variety of traits.
A. always; always
B. never; always
C. never; sometimes
D. sometimes; sometimes
Its not option D yall he lying, its always; always
A student conducted an experiment to test the effect of the digestive enzyme pepsin on cooked egg white and potato in the presence of hydrochloric acid at a pH of 1. Which could be a probable inference? Pepsin digests egg white because it mainly contains protein. Pepsin digests potato because it mainly contains starch. Pepsin digests egg white because it mainly contains fat. NextReset
This is a is a natural substance that cannot be re-made, re-grown, or regenerated as fast as it is used.
In liver cells, the inner mitochondrial membranes are about five times the area of the outer mitochondrial membranes. what purpose must this serve?
The larger area of the inner mitochondrial membrane accommodates the proteins and enzymes necessary for the oxidative phosphorylation process used to generate ATP, a key energy molecule. The increased surface area due to the complex folds, known as cristae, allows for increased ATP production, supporting the liver cell's high metabolic activity.
Explanation:The inner mitochondrial membranes in liver cells being about five times the area of the outer mitochondrial membranes serves a crucial function in energy production. The inner mitochondrial membranes house the proteins and enzymes necessary for oxidative phosphorylation, a process used by cells to generate ATP, which is a key energy molecule. The larger the area of the inner membrane, the more space there is for these proteins and enzymes to reside, hence the greater the capacity for ATP production.
Mitochondria, often described as the powerhouses of the cells, are the sites of cellular respiration, where biochemical processes of respiration and energy production occur. The complex folds of the inner mitochondrial membranes, known as cristae, increase the surface area, allowing for increased production of ATP. Therefore, this high ratio of inner to outer membrane area in the mitochondria of liver cells supports their high metabolic activity.
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Explain how an incubator helps with this cloning experiment.
How do scientists use the Doppler effect to measure the actual motion of stars?
The Doppler effect helps scientists determine a star's radial velocity and rotational speed by analyzing spectral lines for shifts. Redshifts indicate a star moving away, blueshifts indicate an approach, and line broadening suggests rotation.
Scientists use the Doppler effect to measure the actual motion of stars in several ways. They can measure a star's radial velocity, the speed at which it moves toward or away from us, by observing the Doppler shifts in the star's spectrum. When the star moves away from Earth, the spectral lines show a redshift; when it approaches, they exhibit a blueshift. This shift in the wavelength of light can be used to determine the speed of the star relative to the observer.
The Doppler effect can also reveal if a star is rotating by observing the widening of spectral lines, a phenomenon known as line broadening. Light from the edge of the star rotating toward us shifts toward shorter wavelengths (blueshift), while light from the receding edge shifts to longer wavelengths (redshift). Consequently, the spectral lines we observe from the star are broader than those from a non-rotating star, and the amount of broadening can indicate the star's rotational speed.
Additionally, high-resolution spectroscopy allows astronomers to detect subtle variations in a star's radial velocity caused by the gravitational pull of an orbiting planet, leading to planet detection. These minuscule changes do not depend on the star's distance, as long as high-quality spectra can be obtained by large telescopes.
According to the National Institute of Health, peripheral arterial disease (PAD) happens when there is a narrowing of the blood vessels outside of your heart. The cause of PAD is atherosclerosis. This can reduce or stop blood flow, usually to the legs, causing them to hurt or feel numb. If severe enough, blocked blood flow can cause tissue death. If this condition is left untreated, a foot or leg may need to be amputated.
Based on the passage above, which of the following would indicate PAD?
Low flexibility of blood vessels and increased number of white blood cells
High flexibility of blood vessels and decreased number of white blood cells
Low flexibility of blood vessels in the limbs and high blood pressure
High flexibility of blood vessels in the limbs and low blood pressure
The correct answer is C. Low flexibility of blood vessels in the limbs and high blood pressure
Explanation:
Peripheral arterial disease (PAD) as indicated in the text occurs as a result of blood vessels becoming narrow due to atherosclerosis "narrowing of the blood vessels outside of your heart", this and the fact PAD is also the result of fatty material accumulating and blood vessels hardening,show in this disease one of the indicators would be low flexibility of blood vessels as due to the lack of flexibility the flow of blood is limited which is one of the main consequences of PAD. Besides this, PAD can be indicated by high blood pressure, considering the low flexibility in blood vessels causes the blood to push against the walls of vessels more than normal and therefore there is more pressure in the circulatory system. Thus, based on the passage "low flexibility of blood vessels in the limbs and high blood pressure" would indicate PAD.
Describe how evolution changes the relative frequency of alleles in a gene pool. Why does this happen?
when you move your fingers to type a text message you are using motor neurons of the