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Question
Desert plants have long roots that help them ________ .
Options:
A .  prevent transpiration 
B .  absorb water 
C .  retain water 
D .   increase photosynthesis 
Answer: Option B
:
B
Since desert plants live in areas where water is scarce, their roots are long and go deep into the soil for absorbing water.
The leaves in desert plants are reduced to spines to minimise water loss by transpiration.
They have fleshy stem with a thick waxy coat to retain water.
Since their leaves are reduced to spines, their stem is green and performs photosynthesis.

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