Question

challenge:::Q1=why do cactus have spines on their leaves?give reasons Q2=why is the land in deserts not suitable for other plants except low consuming water plants?? ​

Answer 1

question no 1

Spines are also modified leaves. In cacti, spines are wholly transformed leaves that protect the plant from herbivores, radiate heat from the stem during the day, and collect and drip condensed water vapour during the cooler night.

question no 2

The desert is a difficult place to be a plant because of the dry, hot air. To move nutrients up their roots, plants evaporate water from their leaves in a process called transpiration. But in the desert, where water is hard to come by, many plants have adaptations to help save water.

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