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Mariana [72]
3 years ago
6

A weakened immune system may be caused by what?

Biology
2 answers:
r-ruslan [8.4K]3 years ago
9 0
I think the best answer is that there is a virus in the body.
gulaghasi [49]3 years ago
6 0
Smoking and taking drugs allows the immune system to get weak
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Semenov [28]
Hey there!

I think you mean the Finches. Each Finch has a beak that is very similar to other beaks on the other islands. This shows that they are related. Their beaks change so that they can live better in their environment. They all had a common ancestor.

I hope this helps!
8 0
4 years ago
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matrenka [14]

Answer:

True

Explanation:

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3 years ago
What happens during the Krebs cycle
qwelly [4]

Explanation:

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WARRIOR [948]
I think it is the second or first i got the 2 words mixed up
7 0
4 years ago
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Gwar [14]

Answer:

The correct answer is the third option - endocrine signaling.

Explanation:

The endocrine signaling takes place when endocrine cell organs or glands release hormones that flow through the bloodstream and that act on distantly located target cells in the body. The endocrine system includes several glands that release or secretes different hormones.

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Thus, the correct answer is option third - endocrine signaling.

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3 years ago
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