Sinking of zooplankton during the day and rising to the surface at night is an example of

Some flowers open during the day time and close at night this is called:

Two species of water lilies in the same pond do not interbreed because one blooms at night and the other during the day. The reproductive barrier between them is an example of :

Name a waste gas released by the plant (a) only during the day time, and (b) only during the night time

How are day and nights caused ?

In maximum plants stomata open during day and closed in night. Its exception is

An example for a zooplankton.

Stomata open at night and close during the day time in