The most successful parasite is one that:

Given below are two statements $:$
Statement-$I$ : Species facing competition might evolve mechanisms that promote co-existence rather than exclusion.
Statement-$II$ : In endoparasites,morphological and anatomical features are greatly simplified while emphasising their reproductive potential.
In the light of the above statements,choose the correct answer from the options given below.

Carnivorous animals, such as lions and leopards, occupy the same niche, but lions predate mostly on larger animals while leopards take smaller ones. This mechanism of competition is referred to as:

$A$ parasite that lives on another parasite is called:

Which of the following characteristics is described by Gause's competitive exclusion principle?

Sometimes parasites themselves are parasitised by other organisms. Such parasites are known as: