Assertion : A shark can stay at a desired level in water without swinning.
Reason : It has a bouyancy-regulating organ called as the swim bladder.

Assertion : Water can be made to boil without heating. Reason : Boiling point is lowered by increasing pressure.

Assertion : A bony fish can stay at a particular depth without expending energy is a swimming contrary to the cartilaginous fishes. Reason : In bony fishes, the swim bladder is present which helps in buoyancy.

Assertion : A bony fish can stay at a particular depth without expending energy is a swimming contrary to the cartilaginous fishes. Reason : In bony fishes, the swim bladder is present which helps in buoyancy. (a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. (b) If both Assertion and Reason are true ,but the Reason is not the correct explanation of the Assertion. (c) If Assertion is true, but Reason is false (d) If both Assertion and Reason are false.

Assertion: Chondrichthyes swim constantly in water body to avoid sinking. Reason: In chondrichthyes, air bladder is not found.

Assertion : Whale has a thick layer of fat, called blubber, below its skin. Reason: It uses this fat as the source of energy when deep in water.

Assertion: Water can absorb large amount of heat energy.Reason : Water has a very high specific heat capacity.

Assertion: Energy can not be given to a system without giving it momentum. Reason: If kinetic energy is given to a body it means it has acquired momentum.

Assertion: Energy can not be given to a system without giving it momentum. Reason: If kinetic energy is given to a body it means it has acquired momentum.