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olasank [31]
2 years ago
13

The graph below show the number of sunspots observed between 1750 and 2000

Biology
1 answer:
Aleksandr [31]2 years ago
6 0

Answer:A. It was a period of increased solar radiation

Explanation: I took a test and I got it right

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Please help
butalik [34]

The right answer is: The antibodies mistakenly identify the cells as foreign material.

The role of an antibody is to recognize a foreign antigen in order to neutralize it. They can achieve this thanks to the great specificity of their paratope, which recognizes only a very precise part of the antigen: the epitope. As soon as an antibody recognizes an epitope, the B lymphocyte that codes for that specific antibody multiplies and matures in order to synthesize the same antibodies, useful in large quantities.

The phenomenon described in the question is an autoimmunity mediated by autoantibodies.

An autoantibody is an antibody produced by the immune system and directed against one or more proteins of the individual himself

Many autoimmune diseases are due to the presence of these autoantibodies, but the presence of autoantibodies is not necessarily synonymous with such a disease.

Some scientists say that they could have a beneficial role in cleaning up cell debris resulting from a disease.

The way in which these autoantibodies are produced, their precise role, and the reason why they decrease in individuals with certain diseases, are all issues that remain unresolved.

8 0
2 years ago
Read 2 more answers
What is DNA and what is it for
Artemon [7]
DNA stands for Deoxyribonucleic Acid. DNA holds genetic information that determines and organisms traits. DNA contains the instructions for making proteins.
6 0
3 years ago
Darwin's explanation for evolution was dependent on which scientific concept?A:   The ability of organisms to learn   Strike  B:
nydimaria [60]
The correct answer is C

hope this helps have a good day :)
4 0
3 years ago
The nucleus of the cell controls cell activity. which body system performs a similar function in humans?
marta [7]
The nervous system, i could be wrong.
8 0
3 years ago
The finely divided red, brown, and yellow soil coloring originates by what process?
Inessa [10]
The answer for this question is D.Mechanical weathering of very fing grained blue grey clays

Hope i helped please brainliest answer if possible
5 0
3 years ago
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