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ivolga24 [154]
3 years ago
5

Need help asap!!!

Chemistry
2 answers:
svlad2 [7]3 years ago
7 0

Answer:

(A)viruses

Explanation:

Mama L [17]3 years ago
3 0

A virus is a pathogen that can't reproduce by itself. What they do is enter another cell an uses the cells natural reproduction system to reproduce the virus as well. Essentially the virus is feeding off a living cell.

Hope this helped!

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Explanation:

Closed systems are those that do not interact or do not exchange energy with the environment that surrounds them, that is why internal temperatures and conditions are maintained.

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