Question

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page 98 of 100
question 98
in temperate (not extremely hot, dry) climates, plants typically ______.
a keep stomata open all day
b have thin, waxy cuticles on their leaves to prevent water loss
c perform both parts of photosynthesis at the same time
d all of these are correct

Explanation:

• Option A: In temperate climates, water loss risk is lower, so plants can keep stomata open all day for gas exchange (e.g., photosynthesis and respiration) as water availability is relatively stable.
• Option B: Thin, waxy cuticles help reduce water loss, which is suitable for temperate climates where extreme water stress isn't common, balancing gas exchange and water conservation.
• Option C: Photosynthesis has light - dependent (needs light) and light - independent (Calvin cycle, can occur in light/dark) reactions. In temperate climates, with consistent light and water, plants can coordinate these processes, and under favorable conditions, they can occur simultaneously.
• Since A, B, and C are correct, option D is valid.

Answer:

D. all of these are correct