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alexdok [17]
3 years ago
14

What evidence do we get from fossils?

Biology
1 answer:
Oksanka [162]3 years ago
4 0

Answer: This evidence reveals what our planet was like long ago. Fossils also show how animals changed over time and how they are related to one another.

Explanation:

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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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8 0
2 years ago
Which statement explains why oxygen molecules easily diffuse across a cell membrane while glucose molecules do not?
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4 0
3 years ago
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____ compares the age of fossils to each other based on the layers of rock they are found in?
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