The biological species concept use as the primary criterion for determining species boundaries is reproductive isolation.
The biological species concept is a widely used concept in biology to define a species. According to this concept, a species is defined as a group of individuals that can interbreed with each other and produce viable offspring under natural conditions.
The biological species concept holds that species represent distinct evolutionary lines and that reproductive isolation is a key factor in maintaining these lines.
Reproductive isolation can result from a variety of mechanisms, including geographic isolation, ecological specialization, and behavioral differences. The differences can become large enough that interbreeding between populations is no longer feasible.
Learn more about Species
https://brainly.com/question/13259455
#SPJ4
What clues about the past can fossil evidence provide?
A. What type of organisms once lived on the Earth
B. How the Earth has changed over time
C. How the DNA of modern organisms is related to ancient organisms
D. All of the above
Answer: A, C
Fossils tell us about what once lived on Earth, and we might discover DNA on the fossils.
pls help will mark branliest
help find concentration difference
The concentration difference is the difference between the alveolar air in the lungs and the air entering the lungs and is equal to 57.
What is the concentration difference?The concentration difference refers to the difference in concentration of gases (such as oxygen and carbon dioxide) between the alveolar air in the lungs and the air entering the lungs.
The alveoli are small sacs in the lungs where gas exchange occurs. Oxygen diffuses from the air in the alveoli into the bloodstream while carbon dioxide diffuses from the bloodstream into the alveoli to be exhaled.
During inhalation, air enters the lungs and mixes with the residual air in the conducting airways. The concentration of gases in this air is different from that in the alveoli. As the air moves into the alveoli, gas exchange occurs, and the concentration of oxygen and carbon dioxide in the alveoli changes.
The difference in concentration between the alveolar air and the air entering the lungs drives the diffusion of oxygen and carbon dioxide across the respiratory membrane.
Learn more about alveolar air at: https://brainly.com/question/18244999
#SPJ1
direct examination of body fluids, sputum, and stool can provide a rapid detection method for which of the following? multiple select question. viruses fungi prions bacteria
Direct examination of body fluids, sputum, and stool can provide a rapid detection method for a variety of microorganisms including bacteria, fungi, and viruses, but not prions. Option A,B,D are correct.
Bacterial infections can be detected by examining body fluids such as blood, urine, and cerebrospinal fluid. A sample of sputum or stool can also be examined to detect the presence of bacteria causing respiratory or gastrointestinal infections, respectively. The direct examination involves staining the sample with a dye and examining it under a microscope to identify bacterial cells. This method can provide rapid results, allowing for timely diagnosis and treatment.
Fungal infections can also be detected by examining body fluids and tissues. Direct examination of a sample of sputum or tissue can reveal the presence of fungal cells, allowing for a rapid diagnosis. Fungal infections can also be detected through culture-based methods, but these techniques can take longer to provide results.
Viral infections can be detected through direct examination of body fluids, such as blood, cerebrospinal fluid, and respiratory secretions. In addition, stool samples can be examined to detect the presence of certain viral infections, such as rotavirus and norovirus. Direct examination involves using specialized techniques to identify the presence of viral particles or antigens in the sample.
In summary, direct examination of body fluids, sputum, and stool can provide a rapid detection method for bacterial, fungal, and viral infections. This method can facilitate early diagnosis and treatment, improving patient outcomes. However, it is important to note that direct examination may not always be sensitive or specific enough to detect low levels of microorganisms or to identify the specific causative agent of an infection, and further testing may be required. Option A,B,D are correct.
for more such questions on viruses
https://brainly.com/question/30598424
#SPJ11
In fruit flies, the gene for red eyes (R) is dominant and the gene for grey eyes (r) is recessive. What are the possible combinations of genes in the offspring of two red-eyed heterozygous flies?
When two heterozygous red-eyed flies (Rr) mate, their offspring can inherit one of two possible alleles from each parent: R or r.
Therefore, the possible combinations of genes in the offspring are:
RR (homozygous dominant, red-eyed)
Rr (heterozygous, red-eyed)
rr (homozygous recessive, gray-eyed)
The ratio of these genotypes in the offspring is 1:2:1, respectively.
A Punnett square can be used to identify the potential gene pairings in the offspring of two red-eyed heterozygous flies.
Each of the adult flies has one copy of the dominant R allele and one copy of the recessive r allele, making them heterozygous. Their genetics can be represented as Rr.
Red eyes are associated with the RR gene, and red eyes are also associated with the Rr genotype. (because the R allele is dominant over the r allele).
Grey irises are a characteristic of the rr genotype. In the progeny of two red-eyed heterozygous flies, the gene combinations may be homozygous dominant (RR), heterozygous (Rr), or homozygous recessive (RR). (rr).
learn more about recessive here
https://brainly.com/question/2717245
#SPJ1
Because the immune system is still developing, a newborn baby has not yet been exposed to pathogens in the environment. given the overall high prevalence of pathogens in the environment, explain why more newborns do not die from these disease-causing agents.
A) the pathogens stimulate a secondary immune response
B) T and B cells were received across the placenta during gestation
C) antibodies are received from their mothers' milk
D) babies are born with numerous developed, long-lasting antibodies, B cells, and T cells
URGENT HELP NEEDED. I GAVE IT A GO BUT AM CONFUSED
Because antibodies are acquired from their mothers' milk, more newborns do not perish from these disease-causing agents.
Has a newborn child developed any protection to pathogens?In neonatal infants, immunity is only transient and begins to decline after the first few weeks or months. Babies who are breastfed have longer-lasting passive immunity because breast milk also includes antibodies.
What is the primary issue with a newborn's immune system?Your infant either has very little or no production of normal T cells. The correct function of the immune system depends on T cells. Your infant might not be able to fight off infections like the majority of adults if he or she contracts a cold.
To know more about antibodies visit:-
https://brainly.com/question/27931383
#SPJ1
Evolution Steam Case bio Right answers only Pls
Answer:when two chickens have a kid their kid will do the same
to reproduce
Explanation:
Answer: The answer is when two chickens have a chick(baby) their chick(Baby) will do the same to reproduce.
Hope this helps!!!!
Explanation: Please give Brainlist.
which technique uses the least amount of sample needed for forensic analysis? pcr rflp genomic dna cdna isolation southern blot
The Polymerase Chain Reaction (PCR) technique uses the least amount of sample needed for forensic analysis.
PCR is a powerful molecular biology technique that amplifies small amounts of DNA or RNA sequences, making it possible to analyze even a few copies of a particular gene or genetic marker. PCR can amplify DNA from a tiny amount of starting material, such as a single cell or a few drops of blood, making it ideal for forensic applications where the amount of available sample is often limited.
PCR (Polymerase Chain Reaction) is a molecular biology technique that amplifies a specific segment of DNA using a small amount of starting material. This makes PCR an excellent method for forensic analysis, as often only a small sample of DNA is available at a crime scene.
PCR works by using a pair of primers that are complementary to the DNA sequence flanking the region of interest. These primers are added to the reaction mixture along with DNA polymerase, nucleotides, and buffer.
To know more about Chain Reaction here
https://brainly.com/question/29759559
#SPJ4
which is not required for transcription? a primer to unwind dna a promoter appropriate ribonucleoside triphosphates a dna template rna polymerase
A primer to unwind DNA is not required for transcription. Transcription is the process by which genetic information encoded in DNA is copied into RNA by RNA polymerase.
During transcription, RNA polymerase binds to a specific DNA sequence called a promoter and unwinds the double-stranded DNA, allowing the RNA polymerase to access the template strand.
Unlike in DNA replication, where primers are required to initiate DNA synthesis, RNA synthesis does not require a primer. RNA polymerase can initiate transcription without a primer, using the DNA template as a guide for synthesizing RNA in the 5' to 3' direction.
In addition to a promoter and appropriate ribonucleoside triphosphates, a DNA template, and RNA polymerase are required for transcription to occur. The RNA polymerase reads the DNA template in the 3' to 5' direction and synthesizes a complementary RNA molecule in the 5' to 3' direction.
To learn more about RNA polymerase refer to:
brainly.com/question/29664942
#SPJ4
What are 3 arguments why cows aren’t bad for the environment ?
What are 3 arguments why cows are bad for the environment?
The 3 arguments why cows aren’t bad for the environment are:
Carbon SequestrationNatural FertilizerSustainable FarmingWhy are cows good for the environment?Carbon Sequestration: Cows, like other ruminants, have a unique digestive system that allows them to consume fibrous plant materials such as grasses and convert them into high-quality protein. During the process of digestion, they release methane, which is a potent greenhouse gas. However, studies have shown that grazing animals like cows can help sequester carbon in the soil, which reduces the amount of carbon in the atmosphere. This is because the trampling and grazing of cattle can stimulate plant growth, which helps to remove carbon from the air and store it in the soil.Natural Fertilizer: Cows can provide a natural fertilizer for the soil. Their manure is rich in nutrients such as nitrogen, phosphorus, and potassium, which can help to enrich the soil and improve its fertility. This can lead to better plant growth and more productive and sustainable agricultural practices.Sustainable Farming: Cows can be raised in a sustainable and ethical manner, such as in free-range or grass-fed systems. These systems often rely on natural grazing and foraging practices, which require fewer resources than intensive farming methods. Additionally, cows can be raised for multiple purposes such as milk and meat, which can reduce the environmental impact of raising different types of animals separately.Learn about domestic animals here https://brainly.com/question/1036233
#SPJ1
metabolism is a characteristic of life at which of the following levels of organization.
a. organism.
b. population.
c. community.
d. ecosystem
Answer:
At the organism level of organization, metabolism is a feature of life.
Explanation:
Metabolism is the series of chemical events that occur within an organism to keep it alive. These processes include energy generation, chemical synthesis, and nutrition degradation for energy and building blocks. The ability to carry out these metabolic activities distinguishes living beings. As a result, metabolism is a feature of life at the organism level of organization.
Populations, communities, and ecosystems, on the other hand, are higher levels of organization that include several creatures and their interactions. While metabolism is necessary for individual life within these systems, it is not a distinguishing trait of these higher levels of structure.
https://brainly.com/question/31349751
Metabolism is primarily observed at the organism level, as it refers to the chemical processes within a living entity to maintain life.
Explanation:Metabolism is a characteristic of life that is primarily observed at the level of the organism. Metabolism refers to the chemical processes that occur within a living organism in order to maintain life, which includes processes like digesting food and converting it into energy. This process involves individual cells within an organism, thus making it characteristic at the organism level. Although populations, communities, and ecosystems involve organisms that metabolize, they themselves do not metabolize as they are collective groups of organisms, rather than individual living entities.
Learn more about Metabolism here:
https://brainly.com/question/33464430
#SPJ2
cytochemical stains were performed on bone marrow smears from an acute leukemia patient. the majority of the blasts showed varying amounts of myeloperoxidase positivity. some of the blasts stained positive for chloroacetate esterase, some were positive for alpha-naphthyl acetate esterase, and some blasts stained positive for both esterases. what type of leukemia is indicated?
The type of leukemia indicated by the cytochemical stains performed on bone marrow smears with the majority of blasts showing myeloperoxidase positivity is Acute Myeloid Leukemia (AML).
Аcute Myeloid Leukemiа (АML) is а type of cаncer thаt аffects the bone mаrrow аnd blood. It occurs when аbnormаl white blood cells known аs blаsts grow out of control. Cytochemicаl stаins аre commonly used to diаgnose АML. Myeloperoxidаse positivity is а chаrаcteristic feаture of АML blаsts, аs is positive stаining for аlphа-nаphthyl аcetаte esterаse аnd/or chloroаcetаte esterаse. The fаct thаt the blаsts in this pаtient were positive for both esterаses further supports the diаgnosis of АML.
Learn more about Аcute Myeloid Leukemiа: https://brainly.com/question/28384296
#SPJ11
What is basic sience
Answer:
behind the functioning of the human body in health and illness,
Explanation:
identification of unidentified skeletal remains does not rely on which of the following? group of answer choices biological profile antemortem trauma and pathology individualizing traits visual identification
The process of identifying unidentified skeletal remains does not relies on a factor called individualizing traits visual identification, the correct option is (d).
Visual identification of skeletal remains based on individualizing traits such as facial features, scars, or tattoos can be difficult and unreliable, especially when dealing with incomplete or degraded remains.
Therefore, the identification of unidentified skeletal remains typically relies on other methods, such as establishing a biological profile (age, sex, ancestry, and stature) based on morphological features of the bones, comparing antemortem and postmortem records (such as dental records or medical imaging), and examining trauma and pathology to establish a possible cause of death. DNA analysis may also be used to confirm identity or establish familial relationships, the correct option is (d).
To learn more about skeletal follow the link:
https://brainly.com/question/29471575
#SPJ4
The complete question is:
Identification of unidentified skeletal remains does not rely on which of the following? (group of answer choices)
a. biological profile
b. antemortem
c. trauma and pathology
d. individualizing traits visual identification
What graph demonstrates the population slowing/stopping after a period of rapid growth?
A logistic growth curve is a graph that shows the population slowing or stopping after a period of fast growth. The expansion of a population as it approaches its carrying capacity is depicted by a logistic growth curve.
What kind of graph depicts a population that is expanding quickly?Exponential Growth is a line graph that displays population growth over time. The line's ascending curve and rising slope demonstrate the exponential growth of the population.
What kind of graph curve depicts a population that is expanding less quickly?Population growth slows or stops as resources become scarcer. The graph below depicts a yeast population and displays the general, S-shaped curve of this development pattern, known as logistic growth. During a time of exponential expansion, a population's growth slows or pauses, which is known as logistic growth.
to know more about the rapid growth here:
https://brainly.com/question/9751211
#SPJ9
under what circumstances would it be benifitial for organisms to be able to perform a catabolic reaction in an aerobic environment
Catabolic reactions are those that break down complex molecules into simpler ones, releasing energy in the process.
Aerobic environments are those that contain oxygen, which is required for aerobic respiration, a process that converts glucose and other molecules into energy in the presence of oxygen.
Under normal circumstances, it is beneficial for organisms to perform catabolic reactions in aerobic environments, as it allows them to generate energy more efficiently. Aerobic respiration produces significantly more ATP, the energy currency of cells, than anaerobic respiration, which occurs in the absence of oxygen.
However, in certain circumstances, such as during times of oxygen limitation or when the organism is under stress, it may be beneficial for the organism to perform catabolic reactions in an aerobic environment, even if oxygen is not readily available. This can occur through processes such as fermentation or anaerobic respiration, which allow the organism to continue generating energy even in the absence of oxygen.
In summary, while it is generally beneficial for organisms to perform catabolic reactions in aerobic environments, there are certain circumstances where alternative processes may be necessary to sustain energy production.
To learn more about Aerobic respiration refer to:
brainly.com/question/18024346
#SPJ4
in a laboratory experiment of sexually-reproducing insects, a certain trait is determined by a single gene. the dominant allele has complete dominance over the recessive allele, resulting in two different observable phenotypes. scientists created a new population of this insect by crossing 100 homozygous dominant individuals with 100 homozygous recessive individuals. the following results are from the first five generations of this population: generationnumber of individuals with dominant traitnumber of individuals with recessive traittotal number of individuals 1100100200 23250325 3375125500 4300250550 5325425750 answer each part of this question completely in the space provided. using the data, explain the changes in phenotypic frequency from generation 1 to 3. do you think this population is in hardy-weinberg equilibrium? provide reasoning to support your claim.
To determine whether this population is in Hardy-Weinberg equilibrium, we need to compare the observed frequencies of the dominant and recessive traits with the expected frequencies based on the Hardy-Weinberg equation.
The Hardy-Weinberg equation predicts that in a large, randomly mating population with no evolutionary forces acting on it, the frequencies of alleles and genotypes will remain constant from one generation to the next.
The Hardy-Weinberg equation is: p^2 + 2pq + q^2 = 1, where p is the frequency of the dominant allele, q is the frequency of the recessive allele, p^2 is the frequency of homozygous dominant individuals, q^2 is the frequency of homozygous recessive individuals, and 2pq is the frequency of heterozygous individuals.
From the data provided, we can calculate the frequencies of the dominant and recessive alleles as follows:
Frequency of the dominant allele (p) = (100 + 325 + 250 + 25 + 42)/1000 = 0.742
Frequency of the recessive allele (q) = 1 - p = 0.258
Using these values, we can calculate the expected frequencies of the genotypes in the population:
Frequency of homozygous dominant individuals (p^2) = (0.742)^2 = 0.551
Frequency of heterozygous individuals (2pq) = 2(0.742)(0.258) = 0.384
Frequency of homozygous recessive individuals (q^2) = (0.258)^2 = 0.067
To know more about equilibrium here
https://brainly.com/question/11336012
#SPJ4
scientists want to determine the age of four fossil specimens. they have analyzed the fossils and gathered the data shown in table 1. table 1. data collected from four fossil specimens specimen 1 specimen 2 specimen 3 specimen 4 amino acid differences* 5 21 18 11 percent of original carbon-14 remaining 38 73 25 11 composition sandstone sandstone limestone shale dna analysis 35% guanine 28% guanine 12% guanine 29% guanine * amino acid differences of a conserved protein compared with a fifth fossil specimen which of the specimens indicated in the table is the oldest? responses specimen 1 specimen 1 specimen 2 specimen 2 specimen 3 specimen 3 specimen 4
A specimen is a sample of something taken for medical testing, such as blood or body tissue. The Latin word specere, which means "to look," is the source of the noun specimen. In order to conduct research on a subject, biologists gather specimens. The correct answer is specimen 4.
A sample of a medicine's actual printed outer and inner packaging materials as well as the package leaflet.
For a variety of purposes, including basic, clinical, and epidemiologic research studies as well as routine patient monitoring and care, biological specimens (or biospecimens) like blood, urine, and saliva are collected.
A biological specimen of a patient's tissue, fluids, or other material used for laboratory analysis to aid in differential diagnosis or disease progression is known as a laboratory specimen in medicine.
To learn more about specimen here
https://brainly.com/question/31248655
#SPJ4
what is a negative effect of honeydew? group of answer choices transmits plant viruses all of the above sooty mold attracts ants
Honeydew is a sweet, sticky substance secreted by aphids, scale insects, and other plant-sucking insects as they feed on plant sap.
While it is an important food source for some insects, it can have negative effects on plants and other organisms.
One negative effect of honeydew is that it can attract ants. Ants are attracted to the sweet substance and will often protect aphids and other honeydew-producing insects from predators in exchange for the honeydew. This can lead to an increase in the populations of these plant-sucking insects, which can damage crops and transmit plant viruses. Honeydew can also cause the growth of sooty mold, a black fungus that covers leaves and can reduce the plant's ability to photosynthesize. Therefore, the negative effects of honeydew are numerous and can impact various organisms in the ecosystem.
To learn more about plant sap refer to:
brainly.com/question/29788
#SPJ4
which of the following has been associated with a form of liver cancer? group of answer choices hepatitis b virus hepatitis a virus human t-cell lymphotropic virus human papilloma virus
Answer:hepatitis b virus
The Hepatitis B virus has been associated with a form of liver cancer. This virus can cause chronic liver infection, which increases the risk of developing liver cancer.
What is liver cancer?The liver is a vital organ in the human body. The liver's primary function is to filter blood coming from the digestive system before it is circulated throughout the rest of the body. Liver cancer occurs when the cells in the liver grow abnormally or out of control. Hepatocellular carcinoma is the most common type of liver cancer. Hepatitis B is caused by the hepatitis B virus (HBV), a contagious disease that can be passed from person to person via blood or other bodily fluids. A virus that has been linked to a form of liver cancer is the hepatitis B virus (HBV). The hepatitis A virus, the human T-cell lymphotropic virus (HTLV), and the human papilloma virus (HPV) are viruses that can cause liver damage, but they are not linked to liver cancer. The hepatitis B virus has been associated with a form of liver cancer.
To know more about Liver cancer
brainly.com/question/30584984
#SPJ11
Why are operons so well-suited for the control of gene expression in bacteria?
Operons are a type of genetic regulatory system found in bacteria that allow for coordinated control of gene expression. They are well-suited for this role in bacteria for several reasons:
Efficiency: Operons allow for the coordinated control of multiple genes that are involved in a specific metabolic pathway or biological function. By regulating the entire pathway at once, bacteria can conserve energy and resources and respond more quickly to changes in their environment.Flexibility: Operons allow bacteria to respond to changes in their environment by rapidly turning on or off specific genes or entire metabolic pathways. This can be crucial for survival in changing or stressful environments.Simplicity: Operons provide a simple mechanism for gene regulation, allowing bacteria to rapidly respond to changes in their environment without the need for complex regulatory systems.Conservation of genetic material: Bacteria have a small genome size and limited genetic material, and operons allow for efficient use of this limited genetic material. By controlling multiple genes with a single promoter region and regulatory system, bacteria can conserve genetic material and minimize the size of their genome.Overall, operons provide an efficient, flexible, and simple mechanism for controlling gene expression in bacteria, making them well-suited for survival in a wide range of environments.
Learn more about Operons:
https://brainly.com/question/13576345
#SPJ11
which processes can be carried out by producers? question 7 options: a) only photosynthesis b) only cellular respiration c) both photosynthesis and cellular respiration d) neither photosynthesis nor cellular respiration
Producers can carry out both photosynthesis and cellular respiration.The correct option is c)
Producers, also known as autotrophs, are organisms that can produce their own organic compounds from inorganic sources such as carbon dioxide and water. They are capable of carrying out photosynthesis, which is the process by which they convert light energy into chemical energy in the form of organic compounds. During photosynthesis, producers take in carbon dioxide and water and, with the help of sunlight, convert them into glucose and oxygen.
In addition to photosynthesis, producers can also carry out cellular respiration, which is the process by which they break down glucose and other organic compounds to release energy. During cellular respiration, oxygen is used to break down glucose into carbon dioxide and water, releasing energy that can be used by the organism.
Therefore, the correct answer is c) that producers can carry out both photosynthesis and cellular respiration.
To know more about photosynthesis, refer here:
https://brainly.com/question/29764662#
#SPJ11
Could a human baby be produced if the vas deferens were cut?
Answer: A vasectomy is a surgical procedure that cuts or blocks the vas deferens, the two tubes that carry sperm from the testicles to the urethra. The procedure stops sperm from getting into the semen in order to prevent pregnancy.
Explanation:
Which of the following statements is FALSE regarding energy transformation?
A wind turbine can convert wind energy into electrical energy.
A hydro-electric dam uses gravitational potential energy of water stored behind the dam to convert it into electrical energy.
A boulder that is on top of a cliff has a high amount of gravitational potential energy.
A tennis ball that if falling down and about to hit the ground has a high amount of gravitational potential energy.
The false statement is, "A tennis ball that is falling and about to hit the ground has a lot of gravitational potential energy."
When a tennis ball falls, it loses some of its potential energy and gains some kinetic energy. All of the potential energy has been turned into kinetic energy at the point where the ball hits the ground. So, a tennis ball that is falling and about to hit the ground has a lot of kinetic energy, not gravitational potential energy. The amount of potential energy an object has depends on its mass, its distance from the center of the gravitational field, and the strength of the gravitational field.
Learn more about kinetic energy here:
https://brainly.com/question/11749818
#SPJ1
synercid is effective against members of which genera? multiple select question. enterococcus staphylococcus proteus streptococcus enterobacter pseudomonas
The genera against which the synercid is effective are: Enterococcus, Streptococcus, and Staphylococcus.
Synercid is the drug or medication used to treat the bacterial infection which have not responded to the other types of drugs. The synercid is the made by the combination of 2 antibiotics. Skin infection is the one where synercid is used.
Enterococcus is the Gram positive bacteria which are coccus in shape. They are usually present in chain form. These bacteria usually infect the person in hospitals who are admitted for some other treatment. The disease caused by Enterococcus are UTI, bacteremia, and infective endocarditis.
To know more about Enterococcus, here
brainly.com/question/10608199
#SPJ4
PLEASE HELLP ILL MARK YOU BRAINLIST
the answer would be D both parents must have at least one copy of the recessive PKU gene
Biomes are regions in the world that share similar Response area Response area, plant structure , Response area, Response area and Response Area
The term "biome" refers to a region of the planet where the soil type, plant and animal life, climate, and other environmental elements are comparable.
How is a biome defined?A location is categorised as a biome based on the species that call it home. Scientists can characterise a biome by describing the temperature range, soil type, amount of light, and water that are particular to an area and create niches for specific species.
What do biome regions refer to?The five primary categories are aquatic, grassland, forest, desert, and tundra biomes. Some of these, such freshwater, marine, savanna, tropical rainforest, temperate rainforest, and taiga, can be further separated into more focused groupings. Aquatic biomes encompass both marine and freshwater biomes.
To know more about biome visit:-
https://brainly.com/question/1029654
#SPJ1
Value of m - 5 when m = 13 .
Answer: 8
Explanation: m=13 so 13-5=8
What type of immune response does a vaccine cause?
A. Specific, because it exposes the body to a particular antigen.
B. Specific, because it exposes the body to a particular antibody
C. Non-specific, because it will prevent infection from a single antigen
D. Non-specific, because it will prevent infection from multiple pathogens
Answer:
A
Explanation:
A vaccine is given to an individual to usually prevent us from getting infected by one particular pathogen.
What does a vaccine contain?
The contents of a vaccine contains an antigen known to the virus, which enters the human body, which puts your body on work mode to create antibodies, which is basically like a blueprint to help this foreign invader (the antigen) from never being able to infect the body again.
Therefore, the only correct answer would be A.
B is incorrect because it is the antigen that is exposed, the antibody is the creation due to the antigen being exposed.
C is incorrect because non-specific means that there is no specific antigen that prevents infection, which negates the entire statement.
D is incorrect because a vaccine is specific; that is why we need constant boosters such as for the COVID-19 vaccine to keep up with the new variants and mutations.
Where do supporters of the outside-in model say Earth's water originated from?
O Inside of volcanoes
• Inside the atmosphere
• Bonded to meteorites that hit the Earth
O Bonded to minerals in Earth's mantle
Answer: Bonded to meteorites that hit the Earth
Explanation:
if in a population of flowers the large ones are preferentially pollinated by birds and produce more large-sized flowers in the following years, what type of natural selection is this?
The type of natural selection in this scenario is called directional selection.
Directional selection occurs when individuals with a particular phenotype (in this case, larger flowers) have a higher fitness and are more likely to survive and reproduce, resulting in an increase in the frequency of that phenotype over time. In this scenario, the larger flowers are preferentially pollinated by birds, which may result in greater reproductive success and the production of more large-sized flowers in the following years. Over time, this could lead to a gradual shift in the population towards larger flower sizes, as smaller flowers are selected against. Directional selection can occur in response to changing environmental conditions, such as a shift in pollinator preferences or availability, and can lead to evolutionary change over time.
Learn more about “ natural selection “ visit here;
https://brainly.com/question/9830102
#SPJ4