Brood parasitism is found in what?

The relationship between algae and fungi in a lichen is known as:

Define/Explain: Endoparasites.

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.

Which of the following pairs is correctly matched?

Statements
$I.$ Recent studies support competition as suggested in 'Gause's Competitive Exclusion Principle'.
$II.$ Gause's hypothesis states that if two species compete for the same resources,then one will be eliminated by the other species.
$III.$ More recent studies point out that species facing competition might evolve mechanisms that promote co-existence rather than exclusion.
$IV.$ Gause's competitive exclusion principle is effective when resources are in excess.
$V.$ Unlimited resources give better opportunity for adaptation.
Choose the correct combination of statements.