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10-12-2020
Biology

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why are cacti green and why do they need needles

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10-12-2020

Answer:

The needle-like leaves act as a self-defense mechanism that protects the plant from predators. The stem of the cactus plant is swollen and contain numerous collapsible water-storage cells that store water for a relatively long period. The stem is green and performs photosynthesis.

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