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Explanation:
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The statement "Attack nonselectively on nonself cells, especially mutated and malignant cells" accurately indicates the function of natural killer (NK) cells within the immune system.
What are Natural killer cells?
Natural killer cells or NK cells are a type of lymphocyte that plays a critical role in the innate immune response.
One of their primary functions is to recognize and eliminate cells that are infected with viruses or have undergone malignant transformations, such as cancer cells.
Unlike other immune cells that require prior exposure or recognition of specific antigens, NK cells can attack a broad range of nonself cells without the need for prior sensitization.
They are particularly effective in targeting and destroying cells that display abnormal or altered surface markers, making them an essential part of the body's defense against viral infections and cancer.
Thus, the statement is correct.
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Parathyroid hormone's main function is to question 4 options: increase glucose mobilization during stress or fasting. increase insulin-like growth factor i and linear body growth. increase calcium by mobilizing the ion from bone. synergize with thyroid hormone in various functions. increase sodium through reabsorption from kidney.
Answer:
to increase calcium by mobilizing the iron from bone
Explanation:
It does this by stimulating release of calcium from bones and increasing its reabsorption from the kidneys. This helps to maintain calcium homeostasis and is crucial for normal bone metabolism.#spj4
In this lesson, you learned about two patterns of population growth and decline the sigmoid and peak phenomena. Does the seal and killer whale relationship represent a sigmoid or peak phenomenon? Please provide supporting details.
Answer:
The seal and killer whale relationship represents a peak phenomena because when seals are abundant the whale population booms and then it bursts when the seal population can't keep up and it falls.
Explanation:
which type of moth do you think was more common before the 19th century, when most trees were light in color?
Answer:
Light-colored moths.
Explanation:
The process of Natural Selection, or survival of the fittest, says that only organisms with the most desireable traits will survive and reproduce. In an area with mostly light trees, dark-colored moths would have difficulty blending in with them, so they would be easily spotted and eaten by birds. If the dark moth population is reduced, only light moths will be able to reproduce, so their offspring will be light as well. Therefore, in an area with ligjt trees, light moths will evolve and be the dominant type since they can more easily hide from predators.
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In Figure 1, which statement best explains the data trend of an increase followed by a decrease in bacterial cell count?
O The number of host cells in the sample increased until carrying capacity was reached.
O Infection with VP is maximal at 5 hours of exposure.
O VP replicates inside the host cell before causing host cell lysis.
O Rate of VP entry into host cells increases then decreases over time.
The statement that best explains the trend in the data of an increase followed by a decrease in bacterial cell count is VP replicates inside the host cell before causing host cell lysis. Correct answer: letter C.
The trend in the data of an increase followed by a decrease in bacterial cell count can be explained by the fact that VP replicates inside the host cell before causing host cell lysis. VP stands for the virulent phage, which is a virus that infects bacteria and replicates within the host cell.
The increase in the bacterial cell count is due to the replication of the VP, while the decrease is due to the lysis of the host cell, releasing the new VP and resulting in a decrease in the bacterial cell count.
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Euchromatin (a) stains lightly ( b ) is partially condensed ( c ) genetically active chromatin with genes ( d ) all of the above
Euchromatin are genetically active chromatin with genes. The correct option is C.
The euchromatin region of chromatin is involved in the transcription of DNA into messenger RNA. Because euchromatin is more permeable, RNA polymerase complexes and gene regulatory proteins can be recruited, transcription can begin.
Decondensed forms of euchromatin are found in the distal arms of chromosomes. Typically, it replicates throughout the S phase and covers the entire nucleus. Euchromatin is the transcriptionally active type of chromatin.
Euchromatin is more genetically active than heterochromatin because it contains more genes and is loosely packed, making it a simpler format for acquiring genetic data.
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Which item is an example of a community? A. A flock of geese flying south for the winter B. A herd of deer and the animals and plants it interacts with C. A lake and all of the animals and plants that live near it D. All of the garter snakes that are alive on Earth at a specific time
A herd of deer and the animals and plants it interacts with is an example of a community. The correct option is B.
What is Community?
A community refers to a group of interacting organisms that coexist and inhabit the same area or habitat.
It includes multiple species living together and the various relationships and interactions that occur among them.
A herd of deer represents a population of a particular species, and the animals and plants it interacts with, such as predators, prey, symbiotic organisms, and the surrounding vegetation, form a community.
This community encompasses the interconnected relationships and dependencies between the deer population and the other organisms within their shared ecosystem.
A flock of geese flying south for the winter refers to a group of migrating geese and represents a population and a lake and all of the animals and plants that live near it, represent an ecosystem rather than a community.
Therefore, the correct option is B.
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Which of the following statements is NOT true? a. Mitosis results in two diploid cells, while meiosis results in four haploid cells. b. Daughter cells are identical after mitosis, but are not identical after meiosis c. Mitosis creates two daughter cells, while meiosis creates four daughter cells d. Daughter cells are diploid after one round of mitosis, and diploid after one round of meiosis
Answer:
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Explanation:
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Bones undergo a continual process of remodeling until the end of adolescence. after adolescence, there is no bone remodeling.
Select one: O a. True O b. False
Bone remodeling is a process that continues throughout a person's life and consists of the removal of mature bone tissue from the skeleton and the formation of new bone tissue. Therefore the correct choice is false.
These processes not only control the reshaping or replacement of bone after injuries such as fractures, but also the micro-damage that occurs as a result of normal activity. The functional demands of the mechanical loading are also taken into consideration during remodeling.
During the first year of a person's life, almost every single bone in their skeleton is replaced. Remodeling occurs at a rate of approximately 10% per year in adults.
Many metabolic bone diseases, such as osteoporosis, are caused by an imbalance in the regulation of the two sub-processes that make up bone remodeling; these sub-processes are bone resorption and bone formation.
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Problem: Within a population of butterflies, the color brown (B) is dominant over the color white (b). 40% of the butterflies are white. Given this information, choose the correct answers that will properly identify the values for dominant and recessive alleles and genotypes of the population.
What is the value for the dominate allele of the example above?
Question 1 options:
0.04
0.60
0.8
80%
If within a population of butterflies, the color brown (B) is dominant over the color white (b) and 40% of the butterflies are white, and considering HW equilibrium, then the values for recessive allele and genotypes of the population are 0.6 for the recessive allele (√(0.4) equal to 0.6) while the remaining 0.40 will be the proportion of the dominant allele (Option B).
What is the Hardy Weinberg or HW equilibrium in genetics?
The Hardy Weinberg or HW equilibrium in genetics is a model used in population genetics based on the calculation of the recessive and dominant alleles, and consequent genotypic proportions from these frequencies.
Therefore, with this data, we can see that the Hardy Weinberg or HW equilibrium in genetics can be used to calculate the frequencies of the alleles in a population having into account the recessive + dominant alleles equal to 1.
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Are there any parts of the human body that get oxygen directly from the air and not from the blood?
