Biology for IGCSE & O level - Variation And Selection (Section 4 - No. 43)
Why are the spines on cacti considered an adaptive feature?
They help the cactus absorb water.
They protect the cactus from herbivores, reducing water loss and increasing the likelihood of survival.
They make the cactus look visually appealing.
They help the cactus reproduce asexually.
Explanation
Spines help cacti survive by reducing water loss and protect them from being eaten.
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