Write the name of the process by which the exchange of gases between an organism and its environment taking place.

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

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

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

The respiratory system of insects is called:

Which one of the following is the by-product gas of photosynthesis?

Which part of the organism across around which the gas exchange takes place ?

The water proof layer that protects human skin.

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

Percentage of oxygen present in the atmosphere.