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Why do cacti have spines?
仙人掌
表面积 这段
Questioner:Julian Turner 2023-05-05 14:01:27
The most authoritative answer in 2024
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Zoe Clark——Studied at the University of Melbourne, Lives in Melbourne, Australia.
In addition,
cacti have spines instead of leaves. These minimise the surface area and so reduce water loss by transpiration. The
spines also protect the
cacti from animals that might eat them. Watch this clip to see how the saguaro
cactus stores water in its stem.
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