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How does a plant respond in order to keep cool on an extremely hot day? (A) It grows smaller leaves - HSC - SSCE Biology - Question 18 - 2012 - Paper 1
Question 18
How does a plant respond in order to keep cool on an extremely hot day? (A) It grows smaller leaves. (B) It opens stomata in the leaves. (C) It grows more hairs o... show full transcript
Worked Solution & Example Answer:How does a plant respond in order to keep cool on an extremely hot day? (A) It grows smaller leaves - HSC - SSCE Biology - Question 18 - 2012 - Paper 1
Step 1
It opens stomata in the leaves.
Answer
In response to high temperatures, plants often open their stomata to increase transpiration. This process allows water vapor to leave the leaves, which cools the plant's surface and lowers the internal temperature. Opening stomata facilitates gas exchange, but in extreme heat, it helps the plant maintain a lower temperature even as it may lose more water.