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Dafna11 [192]
3 years ago
9

True or false: even single celled organisms have a circulatory system similar to humans.

Biology
1 answer:
Vladimir [108]3 years ago
7 0
False

A single-celled organism doesn't need a circulatory system as human do. Since they are singular, they can interact with their environment directly. Unlike them, a multicellular organism like a human has a part where their cells can't get oxygen or food directly, thus need to be supplied by the circulatory system. Some of the cells also well differentiated so it only accept a certain processed food. 
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2 years ago
In your own words, explain what natural selection is?
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Answer:

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2 years ago
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5 0
3 years ago
Help please :)!!!
Illusion [34]

Answer:

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