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olasank [31]
3 years ago
9

A person infected with the human immunodeficiency virus (HIV) may not have any symptoms for a period of time. During this period

the virus affects the body by doing which of the following?
A. The virus uses nutrients meant for immune cells to fuel its own cellular respiration.

B. The virus produces toxins that weaken immune cells and prevent them from reproducing.

C. The virus changes the identity of the nucleotides of immune cells to prevent the immune system from functioning normally.

D. The virus damages immune cells while using their machinery to produce copies of itself.
Biology
1 answer:
Brilliant_brown [7]3 years ago
7 0

Answer:

B is

Explanation:

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Answer: ozone concentration

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In a group of muskmelon plants, some individuals have sour fruit and others have sweet fruit. in this group, the gene for the fr
juin [17]

Correct option(s):

(b) This muskmelon plant's genotype for the fruit taste gene is ff.

(c) This muskmelon plant is homozygous for the fruit taste gene.

A dominant allele is one that is capable of expressing itself even in the heterozygous condition and overshadows the effect of the recessive allele. It is usually denoted by a capital letter. Recessive allele on the contrary cannot express in presence of a dominant allele and is denoted by a small letter.

In the given case the fruit with a sour taste (phenotype) can have two possible genotypes (FF and Ff). The genotype of sweet taste is ff which is a homozygous condition.  

Note: Your question is incomplete, probably your complete question is “In a group of muskmelon plants, some individuals have sour fruit and others have sweet fruit. in this group, the gene for the fruit taste trait has two alleles. the allele F is for sour fruit, and the allele f is for sweet fruit. a certain muskmelon plant from this group has sweet fruit. this plant has two alleles for sweet fruit. Choose the correct option:

(a)  this muskmelon plant's genotype for the fruit taste trait is sweet fruit.

(b) this muskmelon plant's genotype for the fruit taste gene is ff.

(c) this muskmelon plant is homozygous for the fruit taste gene.”

Know more about Mendelian genetics here:

brainly.com/question/10189802

#SPJ4

7 0
2 years ago
What is the theory of natural selection, and why does it occur in an organism? Give an example.
BlackZzzverrR [31]

Answer:

It occurs in organisms because an organism with a beneficial trait/mutation have a higher chnace of surviving compared to organisms that do not. So the organsims that do survive pass on their genes to the next generation, and the bext generation will pass on those genes to the generation after and so on. But all the organisms that do not possess a beneficial trait/mutations will not survive, therefore they cannot reproduce and pass on those genes to their offspring. This means that most of the population will posses that trait/mutation.

Example: Spotted moths camouflage with bark so they are seen by predators and eaten. Black moths are easily seen by predators and are eaten. Spotted moths then pass on their genes to the next generation of moths.

5 0
3 years ago
Explain in details the agency problem
bezimeni [28]

Agency problem

Agency problem also known as agency costs occurs in a two-party relationship (principal/agent) where the agent is expected to act or make decisions for the good of the principal.

For example in a corporate the relationship between the management and shareholders. The management is expected to make decisions that will maximize shareholders interest. The problem arises when the two parties have different interests. In the example above the manager may opt to make his own wealth and not act in the company’s best interest which could be maximizing company’s market value.

Examples of agency relationship in finance

Managers/stockholders

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Causes of conflicts between managers and stockholders may include;

Remuneration - low remunerations or fixed salaries despite increased profit margins.

Differences in risk profile- stockholders may prefer high-risk return investments contrary to the managers. When high-risk investment go bad the manager risks job loss

Manipulation of accounting systems- to reflect high profits.

Unnecessary perks management award themselves.

Solution to these problems include threat for firing in case of poor performance, shareholders may also threaten to sell the company, remuneration based on performance, incurring agency costs-these are costs incurred while hiring external auditors, setting a control system, legal costs for employment letters and contracts.

 

Agency problem may be reduced by motivating the manager to act for the companies best interest by offering incentives

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4 0
3 years ago
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