[Nicolas Sanchez]

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The labels 1, 2 and 3 in the following diagram represent cellular processes.
The shaded areas represent processes that can happen without the use of energy provided by cellular respiration.

[see diagram below on the left]

Which processes could labels 1, 2 and 3 represent?

[see table below on the right for answer choices]

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Discussion

[Paris]

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We are told that the shaded circles represent processes that occur without the use of energy provided by cellular respiration. Therefore, 2 and 3 are passive processes, like osmosis and diffusion. 1 represents a process that requires energy such as active transport.

The answer is A.