Question

assertion : living creatures must keep repairing and maintaining their structures reason: nutrition, respiration, excretion etc are maintainance processes.​

Answer 1

Answer:

(c) Assertion is true but reason is false.

It is true organisms need to maintain and repair their structures repetitively, but process like nutrition, respiration and excretion have no direct role to play.

Major maintenance processes are are products of the genes, either enzymes, or local hormones.

Regulatory mechanisms of the body are more of hormone feedback mechanism.

Nutrition may provide the raw materials, and respiration, its energy, but they are not considered as Repair or Regulatory mechanisms.