An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female of his species and tries to copulate with it, thereby pollinating the flower. This phenomenon is called

In an aqueous environment, the microscopic animals are collectively called

Select the statement which explains best parasitism.

When one organism is benefitted without affecting the others is called

What is brood parasitism ? Explain with the help of an example.

$A$ : The interaction between sea anemone and clown fish is commensalism.
$R$ : The fish gets protection from predators but anemone does not appear to derive any benefit.