Discussion
Consider the following functions for plants :
A. To give support to the plant
B. To provide humus
C. To store food
D. To absorb water and minerals
The functions of roots are
Answer: D
The functions of roots are A, C and D.
Roots anchor the plant firmly in the soil and give it support (A). They absorb water and dissolved minerals from the soil (D). Many roots also store food: carrot, radish, beetroot and sweet potato are swollen storage roots (C).
Roots do not provide humus (B). Humus is the dark organic matter in soil formed when dead plants and animals decay; it enriches the soil, but roots do not make it. Every option that includes B is therefore wrong, and 'C and D only' leaves out support.
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