Question

ASSERTION
The relationship between sucker fish and shark is considered to be an example of parasitism.
REASON
Sucker fish gets food and shelter from shark and also alters the growth of shark
A. Both assertion and reason are incorrect and reason is a correct explanation for assertion.
B. Both assertion and reason are correct but reason is not the correct explanation for assertion.
C. Assertion is correct but reason is incorrect.
D. Both assertion and reason are incorrect

Answer 1

Hint:-Sucker fish and sucking fish and the Marine fishes. They have a flat elongated body. It has a sucking disk on its head. This helps sharks in attaching to larger fish or in moving objects. Shark is a carnivorous animal, that is it eats other living beings for its survival. Shark Belongs to class Chondrichthyes. Sucker fish is considered as a very dangerous mammal species in the world.

Complete step-by-step solution:-Commensalism is the relationship between the individuals of two species. Out of these two individuals one is benefited and other is almost unaffected that is no one either harmed or benefited. Sucker fish ,example Remora, Echeneis gets attached to the shark in its underside through the sucker of shark also modified dorsal fin. This fin locates in the shark's head Generally it stays fixed to the shark, but rarely detached itself away enough to capture the shark's prey through its fragments.
An interaction where both the individuals are benefited is known as Symbiosis. An interaction between two species, when one captures, kills and eats the other species or weaker species is called predation. An interaction between individuals of two different species who have different size and here smaller one is benefited and larger one is harmed, such interaction is known as Parasitism.
So from above discussion we can conclude that correct answer is option D

Both assertion and reason are incorrect

Note:-
A biological interaction between individuals of two different species in which members of one species benefit, while the other species is neither harmed nor benefitted. Sucker fish attach themselves to the shark using a dorsal fin. As it quickly catches the pieces of food, the shark doesn't get any benefit from it.