Question

Slow respiring plant or plants tissues are

• A. Promeristem.
• B. Cambium.
• C. Leaf primordial and young plant.
• D. Adult plants and matured tissues.

Answer 1

The correct option is D Adult plants and matured tissues.

• Plants, in general, are stationary and hence have lower metabolic rates than animals. Most of the adult plant body is made of dead tissues example big woody trunks and most of the brown or woody part in a plant body is dead tissue.
• Further, plants have evolved for a stationary mode of life so that they have lesser energy requirements and most of the photosynthates are stored in fruits, cotyledons, endosperms and other plant parts for consumption by heterotrophs, which have evolved for a mobile way of life and have higher metabolic rates.
• The old, senescing and dying parts of the body of an organism, in general, have lower metabolic rates and consequently, the energy requirement is also diminished.
  Hence, the correct option is D.