Question

(i) Thermoregulation energetically least
expensive process for many organisms like
shrews and humming birds.
(ii) 99% animals and nearly all plants cannot
maintain their constant internal
environment.
(iii) During the course of evolution, the costs
and heights of maintaining a constant
internal environment are discarded.
(iv) In aquatic animals, the osmotic
concentration of the body fluids change
with that of the ambient water osmotic
concentration.
(a) (i) and (ii) are wrong
(b) (iii) and (iv) are wrong
(c) (i) and (iii) are wrong
(d) (ii) and (iii) are wrong

Answer 1

Explanation:

(i) and (ii) are wrong.....

Answer 2

(c) (i) and (iii) are wrong

Explanation:

The animals and plants in which the temperature of body and osmotic concentration change according to surrounding condition are called conformers. Nearly all plants and about 99 per cent of animals cannot maintain a constant internal environment. These animals and plants are simply conformers. The osmotic concentration of the body fluids change with that of the ambient, water osmotic concentrations, in aquatic animals. These conformers had not evolved to become regulators because thermoregulation is energetically expensive for these conformers. Small animals (shrews and humming birds) have larger surface area relative to their volume because heat loss or heat gain is function of surface area. During the course of evolution, the costs and benefits of maintaining a constant internal environment are taken into consideration.