Answer: virus are nun living virus do not have all the characteristics of living organisms they are not made of cells do not use in and obtain energy they do not respond to the environment.
Explanation:
<u>2</u>, <u>1</u>
Igg possesses <u>2</u> binding sites for antigen, and the t-cell receptor possesses <u>1</u> binding sites for antigen.
<h3>IgG: What Does It Mean?</h3>
- Known as immunoglobulin G, It is an antibody of some sort.
- Your immune system produces antibodies, which are proteins, to combat pathogens.
- Your cerebrospinal fluid's levels of IgG are measured using a CSF IgG index.
- Normally, your cerebrospinal fluid contains very little IgG.
<h3>What is the role played by IgG in the body?</h3>
- IgG is typically the most prevalent antibody in blood.
- It guards against infections.
- Therefore, infections are more likely to affect those with IgG deficiencies.
- Your body produces unique proteins known as immunoglobulins or antibodies when it senses an attack.
<h3>When IgG is positive, what happens?</h3>
- The presence of IgG indicates that the infection occurred several weeks to months ago.
- Additionally, it implies that you might no longer be contagious.
- IgG suggests that you might have some viral immunity, though you might not.
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Answer:
C. disruptive natural selection
Explanation:
Disruptive selection is a type of natural selection in which extreme phenotypes are favored over intermediate phenotypes in a population. Environmental change is a major factor that can bring about disruptive selection. The individuals with the extreme phenotypes adapt well and are able to survive in the particular environment, while those individuals with intermediate phenotypes would hardly survive or be greatly reduced in number.
The gray rock outcrops and the brown soils of the Island favors the survival of mice with brown and gray fur color respectively. The fur colors of these two extreme phenotypes in the population of mice, have helped both varieties against Hawks as their main predators, hence establishing their existence on the Island.
