What is the role of succulent stem and needles or spines in the survival of cacti plant
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Cacti plants have green and thick-walled stems dominated with a lot of needle-like structures referred to as spines. The main role of these modified stems and leaves is to store water for a reasonably long period and minimize water loss as well.
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Cacti have also developed succulent tissue, waxy skin, prickly spines, and a specialized root system to take every advantage in their harsh ecosystems. The stem acts as a reservoir; the plant will expand and contract depending on the amount of water it holds.
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