Two closely related species competing for the same resources cannot coexist indefinitely and the competitively inferior will be eliminated eventually. This principle is known as:

Which characteristic allows species of the same type to coexist in the same habitat without competition?

Brood parasitism is observed in which of the following?

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Abingdon tortoise in Galapagos islands became extinct within a decade after goats were introduced.
Reason $R$: Goats were more efficient at browsing than Abingdon tortoise.
In the light of the above statements, choose the most appropriate answer from the options given below:

Which organisms protect themselves from predators by having a bitter taste?

The phenomenon where organisms resemble other organisms to escape from predators is called .........