Which of the following is not a defence evolved by a prey to avoid predators?

Which one is an example of "Sexual deceit"?

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:

What is the primary role of predators in an ecosystem?

Identify the correct statement/s from the following:
$I$. $Cuscuta$ is a chlorophyllous endoparasite.
$II$. The human liverfluke needs only one host to complete its life cycle.
$III$. The life cycle of endoparasite is more complex due to their extreme specialisation.
$IV$. During the course of evolution the host bird's eggs have evolved to resemble the eggs of the parasitic bird.

Describe competition.