Question

Which of the following describes a parasite? (I know it’s between B or D but I’m not sure which one, also, please don’t put links!!)
A) A fish that is killed and eaten.

B) A worm that lives inside a bear.

C) A bear that kills and eats fish.

D) A bear that has worms in its gut.

Answer 1

Answer:

B) A worm that lives inside a bear.

Explanation:

A parasite is a living organism that lives inside or outside of another organism called a HOST in order to obtain nourishment from such organism. A parasite that lives inside its host is called ENDOPARASITE while a parasite that lives outside its host is called ECTOPARASITE.

In this question, a worm that lives inside a bear is a PARASITE because it is living inside the bear, which is the host in order to obtain nourishments. Note that, the answer is not option D because the bear is a HOST not a parasite.