Question

why do plant in a hot desert long and fleshy root and stem​

Answer 1

The plants grow deep roots to gather water that is far down under the surface of the earth. At such a deep level, the water evaporates from the desert heat much slower than it does closer to the surface.

Answer 2

$\huge {\underline {\underline {\sf {ও \: Answer}}}}$

The plants grow deep roots to gather water that is far down under the surface of the earth. At such a deep level, the water evaporates from the desert heat much slower than it does closer to the surface.