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Pachacha [2.7K]
3 years ago
6

Which organism does not have a double loop circulatory system A) bird B)fish C) human D) dog

Biology
1 answer:
natta225 [31]3 years ago
5 0
Well double loop circulatory systems are present in mammals and bird if I remember correctly, since fish is the only animal that is that a mammal or a bird that would be the answer, B.
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Ahat [919]

Answer:

Electrons Can Donate - 0

Electrons Can Receive- 2

Valence  - 2

Explanation:

The electronic configuration of oxygen is 1s^2s^22p^4. Thus in the p-orbital there is deficiency of two electrons. Hence, it can receive/share electron but it cannot donate electrons. This makes oxygen as a good electron acceptor. Since there is a deficiency of two electrons in the outermost shell of oxygen, the valence of oxygen in thus -2

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Explanation:

3 0
3 years ago
Which of these pieces of evidence did NOT help in the development of the theory of plate tectonics?
Ivan
D did not help them...
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maw [93]

Tissues. -Groups of similar cells that work together to perform a specific task or function-Blood BLANK is made of simimlar (blood cells) that work together to do a job.
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The correct answer should be B
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