Reproduction and Modification in Plants

Unit 5

Reproduction and Modification in Plants

Learning Objectives

*To get a clear idea, how a flower become a fruit with seed through pollination and fertilization.

* To acquire knowledge about the pollination and pollinators

* To differentiate self pollination and cross pollination in plants.

* To know the modification of root, stem and leaves.

* To understand how these modifications are useful to animal and Human Being

Introduction

Already we know that flowering plants have root, stem and leaves. They are called vegetative organs. Flowers, fruits and seeds in a plant are called reproductive organs. In earlier classes we have seen new plants can be grown from seeds. In this lesson, we are going to know about how a flower changes itself into a fruit and the modifications of root, stem and leaves of a plant.

ACTIVITY 1

Aim:

To raise a new generation of plant from watermelon and potato.

Materials required:

Two pots with soil, potato, watermelon seeds and water.

Procedure:

Fill both pots with soil mixed with compost or manure. Take young potato. Ensure that it is not dried up and the skin still looks fresh. Bury a potato in one part. Sow watermelon seeds in another pot. Pour water regularly and maintain the plant

Observation:

After few days, we can see single plant arising from a buried potato. Plants arise from the pot sowed with watermelon seeds. Each seed produces a plant

Inference:

Watermelon plants were produced from seeds. Potato plant is not from seed, but from the stem tuber (vegetative part). Seed is not only the source for new generation, even vegetative part of a plant can also be used to produce a new plant.

Find out how these plants reproduce: