UNIT  3  PLANTS

Plants are living organisms such as trees, herbs, bushes, grasses, vines, ferns, mosses, and green algae.

They provide us with food materials, wood and also convert carbon monoxide into life giving oxygen.

They are composed of many parts such as roots, stem, leaves, buds, flowers, fruits etc.

 

MAIN PARTS IN A PLANT

 

 

 

Root: roots originate from the lower portion of a plant and they are in the soil. Their functions are to absorb nutrients and moisture, anchor the plant in the soil, support the stem, and store food such as carrots. In some plants, they can be used for propagation.

 

Stem: the stem is the upper part of the plant and bears branches, leaves, flowers and fruits. Stem is generally green when young and later often become woody and dark brown. It conducts water and minerals from the root to the leaves. Some stems perform the function of storage of food for example potato.

 

Leaves: leaves provide trees with all their food because they turn sunlight into food energy through photosynthesis. Leaves also make the oxygen in the air that we breathe.