Question

Icefish and Antarctic fish remain active in extremely cold water due to
A. development of a thick layer of subcutaneous fat
B. development of extra solute in body fluids
C. development of ice-nucleating protein in extracellular spaces
D. both (B) and (C)

Answer 1

Hint: Cold toughness is for ice fish and Antarctic fish to stay dynamic in very virus water. They are cold-blooded creatures.

Complete Answer:
- We all know that in extreme temperatures, humans can't remain active, be it extreme heat or cold. In extreme heat, we sweat continuously and our energy level goes down. Similarly, in extremely cold temperatures, our body starts freezing and we feel numb completely.
- Thus, for us to function properly, a moderate temperature is essential. It is because our body is not accustomed to extreme temperatures due to the structural organization of our body. But, Ice fishes as well as Antarctic fishes are accustomed to extreme temperatures and survive in extremely cold conditions even.
- Their reason for activeness in such temperatures is cold hardiness, which is achieved by developing extra solutes in the body fluids as well as ice-nucleating protein in extracellular spaces. These extra solutes are glycerol and antifreeze proteins. Icefish or Antarctic fish stay dynamic even in extremely chilly ocean water because of cold solidness.
- Cold toughness is accomplished by growing additional solutes in the body liquids and uncommon ice-nucleating proteins in the extracellular spaces. The additional solutes which forestall freezing are glycerol and liquid catalyst proteins. They bring down the point of solidification of body liquids.

Thus, D is the correct option.

Note: Icefish and Antarctic fish stay dynamic in an outrageous winter as a result of the essence of ice on the upper surface of the water. This ice acts as a separator and it doesn't permit the external virus to go through it and helps sea-going life in keeping up their internal heat level.