Question

A student prepared a temporary mount of leaf peel and observed some green dots
(a) Name the green dots and name the pigment present in them.
(b) State their function.

Answer 1

a) CHLOROPHYLL is the pigment and CHLOROPLAST are the green dots..
b)It helps in the preparation of food i.e photosynthesis

Answer 2

The green dots are known as stomata and the pigment present in them is known as chlorophyll.

Stomata are the pores or small openings under a leaf for effective gaseous exchange.

Air and gases enter a plant through the stomata.

For photosynthesis, carbon dioxide is used.

A little bit of produced oxygen is used for respiration.

The extra oxygen left behind leaves a plant through the same pores.

Water vapor also exits into the atmosphere with the help of these small openings in a process called transpiration.

These small openings are created due to a pair of cells that are called the guard cells.

They help in adjusting the size of an opening by alternately opening or closing.

For opening a guard cell, protons are provided to a guard cell.