Question

Write the role of spines in cactus

Answer 1

Answer:

In desert there will be water scarcity.So plants try to reduce transpiration.So their leaves were modified as spines.As there are spines on their surface herbivores don't eat them and thus the plants will be saved.

Answer 2

Answer:

Most species of cacti have lost true leaves, retaining only spines, which are highly modified leaves. As well as defending against herbivores, spines help prevent water loss by reducing air flow close to the cactus and providing some shade. In the absence of leaves, enlarged stems carry out photosynthesis.

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