Question

Leaves are reduced to spines in some desert plants.why?

Answer 1

hey mate

here is your answer :-

because desert plant have shortage of water so it protect the water from plant

I hope it helps you

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Answer 2

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.