Question

Identify the incorrect statement (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) (b) (iii) and (iv) (c) (i) and (iii) (d) (ii) and (iii)​

Answer 1

Answer:

all r incorrect except number 3 and 4

Answer 2

The incorrect statement is (c) (i) and (iii).

(i) Thermoregulation energetically least expensive process for many organisms like shrews and humming birds.

• Thermoregulation is the ability of an organism to maintain constant body temperature in different environments.
• Thermoregulation is energetically expensive for organisms which are smaller in size like shrews, humming birds etc.
• Due to their small size, the ratio of surface area to volume is more and thus, these animals lose heat faster so they have to give more time and energy to maintain the temperature.
• Hence, they need a significant amount of energy to generate body heat.

(iii) During the course of evolution, the costs and heights of maintaning a constant internal environment are discarded.

• Process of maintaining a constant internal environment during the course of evolution is known as homeostasis.
• During the course of evolution, the costs and benefits of maintaining a constant internal environment are taken into consideration and not discarded.

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