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notka56 [123]
4 years ago
6

Please help me really trying to get my grades up

Biology
1 answer:
Ne4ueva [31]4 years ago
6 0
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A population of beetles eats only red flowers. Most of the beetles are red but a few of them are yellow. The red beetles are hid
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There would be more yellow beetles cause now theirs only yellow flowers

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Signals that are from molecules that are not normally found in the body are called _________ signals, unlike endogenous signals
anzhelika [568]

Answer:

The answer is exogenous/non-self signals.

Explanation:

  • All types of stimuli that trigger certain responses from cells are broadly classified into two categories:
  1. Self/ Endogenous Ligands

A ligand is a carrier molecule that can binds to a stimulus, thus, producing a signaling molecule. Ligands bind to specific receptors in or the surface of the cell.

Self/endogenous signals are signaling molecules produced by the body itself.  They are part of normal cellular communication.

    2. Non-self/Exogenous Ligands:

These are signals produced by a foreign source such as a pathogen or a drug administered into the body. Basically, any signal that is foreign to the body and not produced by the body itself are exogenous ligands. Exogenous ligands elicit an immune or allergic response in the body. When identified, these ligands and their source is attacked by the immune system.

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Which trophic level receives the least amount of energy?
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Tertiary consumer

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Fungi are made up of _______ cell(s).
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Answer:

One cell Fungi are made up of one cell.

Explanation:

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Arctic toothfishes live in very cold water year-round. These fishes have genes that code for freeze-resistant proteins. The prod
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The production of such proteins in these fish is an example of adaptation.

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