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victus00 [196]
3 years ago
6

What is an indicator that a chemical change has occurred?

Biology
2 answers:
Pachacha [2.7K]3 years ago
7 0

Answer:

a change in energy

Explanation:

julsineya [31]3 years ago
7 0

Answer:

It is A

Explanation:

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<u>d. Transport proteins within the membrane serve as a tunnel for molecules to enter the cell. </u>

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