1.

    The compensation point in plants is reached when...

    A

    Photosynthesis ceases entirely, and only respiration occurs.

    B

    The rate of photosynthesis equals the rate of respiration, resulting in no net gas exchange.

    C

    Respiration ceases entirely, and only photosynthesis occurs.

    D

    The plant switches from C3 to CAM photosynthesis.

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    2.

    How do plants obtain the oxygen required for respiration at night when photosynthesis is not occurring?

    A

    They store oxygen produced during the day

    B

    They switch to anaerobic respiration

    C

    Through lenticels and diffusion from air spaces within the plant

    D

    They do not respire at night

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