1.

    In a CAM plant undergoing a prolonged drought, which physiological change would be MOST prominent in its leaves during the daytime?

    A

    Stomata open, and CO2 is directly fixed by RuBisCO.

    B

    Stomata remain closed, and malate is decarboxylated to release CO2.

    C

    Stomata partially open, and PEP carboxylase fixes atmospheric CO2.

    D

    Stomata remain closed, and the Calvin cycle ceases completely.

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    3.

    Leaf

    A

    Is a lateral generally flattened structure born on the stem

    B

    Is a vegetative organ for photosynthesis

    C

    Originates from shoot apical meristem

    D

    All of the above

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