Question

A living mechanical tissue is ?
a) Collenchyma
b) Parenchyma
c) Sclerenchyma
d) Aerenchyma

Answer 1

collenchyma
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Answer 2

Answer:  

A living ‘mechanical tissue’ is the Sclerenchyma.

Explanation:  

It is the strengthening tissue that is found in the plant, it consists of various kinds of hard ‘woody cells’. The mature sclerenchyma cells have a great tendency to thicken and help in the formation of the bark.

They do not perform any other metabolic activities of the plant other than providing structure and mechanical strength. Their cell wall is thick and contains lignin.