Home
Class 11
BIOLOGY
Assertion : A shark can stay at a desire...

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.

A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

B

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

C

If the assertion is true but the reason is false

D

If both the assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
D
Shark is a cartilagenous fish and lack buoyancy regulating organ called Swim bladder. These fishes swim constantly or will sink to the bottom. They cannot stay at a desired level in water without swimming.
Promotional Banner

Similar Questions

Explore conceptually related problems

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: 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 : Camel can go without water for long periods . Reason : Camel stores water in the pouches of their rumen and fat in their hump.

Assertion (A) : The vectors which can undergo parallel displacement without changing its magnitude and direction are called free vectors. Reason (R ) : vec(a).vec(b)=vec(b).vec(a)

Assertion: A few toxic substances often present in industrial water can undergo biological magnification. Reason: Toxic substances accumulated by an organism can not be metabolised or excreted.