3rd Class Science Parts of Plants Plant Kingdom

       Plant Kingdom

Like all other living things, plants also perform metabolic procedures in order to survive. In this chapter, we will study about the different types of plants and their characteristics features.

       Characteristics of Plants

Need food to grow.

Need oxygen for breathing purpose.

Do not move from one place to another like animals. But they also show movements. For example, folding of leaves of mimosa pudica on touching, bending of sunflower towards Sun, blooming of flower from buds and trapping of insects by insectivorous plants.

Plants prepare food for themselves in the presence of air, water and sunlight.

Plants reproduce their own kind.

Plants also respond to stimuli with the help of their sense organs. But sense organs of plants are not highly developed as that of animals.

The smallest unit of plant body is cell.

Plants can adapt themselves in different climatic conditions.

We see different types of plants in our surrounding. Soil, water, rain, sunlight affects the growth of the plants. Plants are the living organism that traps Sun's energy and produce food in the presence of water and carbon dioxide. This process is called photosynthesis, and it occurs in the green leaves. Leaves are called as the kitchen of the plant. Plants are called producer as animals like sheep, goat, cow, camel etc. depend on the plants for their food supply as a whole.

         Classification of Plants on the Basis of their Habitat

Terrestrial plants: Plants growing on land are called terrestrial plants. For example, mango tree, oak tree, shesham tree, papaya tree etc.

                    Oak tree                                               Mango tree                                         Shesham tree  

         Aquatic plants: Plants which grow in water are called aquatic. Examples: water hyacinth, lotus, lily, etc.

       Classification of Terrestrial Plants on The Basis of Their Habitat

 Look at the following flow chart of the types of terrestrial plants:

       Classification of Aquatic Plants on The Basis of Their Habitat

Look at the following picture of the types of aquatic plants:

     Plant 'X' is an aquatic plant with long slender hollow stem. Identify X?

(a) Hydrila

(b) Vallisnerea

(c) Lotus

(d) Water hyacinth

(d) All of these

Answer: (c)

Explanation

Lotus is an aquatic plant having long slender hollow stem. Therefore, option (c) is correct and rest of the options is incorrect.

   The below mentioned plant is mostly grown in which one of the following types of atmosphere?

(a) Hilly areas

(b) Desert

(c) Planes

(d) Hot and damp places

(e) Marshy land

Answer: (d)

Explanation

Coconut is a plant of hot and damp places. It has large number of leaves and look evergreen. It grows near sea coasts. Therefore, option (d) is correct and rest of the options is incorrect.