Carbon dioxide and oxygen diffuse in and out of leaves through small openings called:

Percentage of oxygen present in the atmosphere.

Gases are diffused in and out of leaves through small openings called stomata. A stomata is surrounded by two cells called:

Guard cells become turgid by actively transporting which of the following ions ?

Large amount of water vapour are lost from leaves by which of the following process ?

The respiratory system of insects is called:

Write the name of the process of stomatal opening and closure.

The branchioles end in millions of tiny interconnected cavities called:

In large organisms, such as humans, the ratio of surface area to volume is:

The part of the leaf of a terrestrial plant on which stomatal opening is seen: