Question

Assertion (A): Most of plant tissues are dead.
Reason (R): Due to the sedentary existence of plants, dead cells provide mechanical strength more easily than live ones and need less maintenance.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
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Answer 1

(a) Both A and R are true and R is the correct explanation of A.

Explanation:

• Dead cells can provide mechanical strength as lives ones and need less maintenance, most of the cells in plant tissue are dead.

• Sclerenchyma is the dead mechanical tissue in plants.

• The dead cells provide strength and support to the plant parts.

• Hence, Most of plant tissues are dead due to the sedentary existence of plants, dead cells provide mechanical strength more easily than lives ones and need less maintenance.