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hoa [83]
3 years ago
13

What is Geographic isolation? *

Biology
1 answer:
Harlamova29_29 [7]3 years ago
3 0

Answer:

When populations are separated by a barrier forming a new species

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The responses observed in type IV hypersensitivities result from the action of IgG and complement. autoantibodies. IgE antibodie
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The responses observed in type IV hypersensitivities result from the action of T cells and phagocytes.

Hypersensitivity IV type, also called delayed-type hypersensitivity (DTH), involves T cell-antigen interactions that cause activation and secretion of cytokines. This type of hypersensitivity requires sensitized lymphocytes that respond 24–48 hours after exposure to soluble antigens. A type IV hypersensitivity reaction is a cell-mediated reaction that can occur in response to contact with certain allergens, resulting in what is called contact dermatitis, or in response to certain diagnostic procedures such as the tuberculin skin test. Certain allergens need to be avoided to treat this condition. Type IV hypersensitivity response is observed results from the action of T cells and macrophages while other types are mediated by antibodies. This reaction  occurs at least 1–3 days after the initial exposure. Type IV hypersensitivity is the mechanism of many autoimmune disorders.

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Vitamins help enzymes function as _____. A.proteins <br> B.coenzymes <br> C. minerals <br> D.fats
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3 years ago
Which statement about the cell membrane is true?
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Its D, The cell membrane(also known a the plasma membrane) has a job in which it has to allow passage in and out of the cell. Therefore it can prevent harmful substances from entering the cell. Think of it as security, either allowing you access or denying you depending on if you're a threat

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What is length?Name any two devices used for measuring the length.​
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the size of something from one end to the other; how long something is

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