It is believed that the thick fleshy stem and transformation of leaves into needles or fluff in cacti are adaptations to their habitat.

It is believed that the thick fleshy stem and transformation of leaves into needles or fluff in cacti are adaptations to their habitat. Explain what is the essence of these devices? In what conditions do cacti grow?

1) Cacti grow in arid environmental conditions
2) The fleshy stem contains a well-developed aquiferous tissue where water is stored, the products of photosynthesis are also deposited in the stem (the stem has the ability to photosynthesis and performs the function of leaves that have undergone reduction)
3) Leaf reduction reduces water loss during transpiration (evaporation) and helps plants survive in arid environments.

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