Page 10 - Active Science 5 Ebook and Activity

Growth of new plants occur by the process called reproduction. Reproduction is the
process of producing babies of their kind by all living things. Plants reproduce through

various ways like from seeds, roots, stem and even from the nodes that arise from the
edges of the leaves.

R eproduction by Seeds

Seeds are present inside the fruits. When these seeds are sown in the soil, they give rise
to the new plant. Let us understand the structure of a seed.

Activty 1.1

Aim : To identify the structure of a seed.
Materials Required : Few gram seeds, water and a plate.

Procedure 1. Soak gram seeds in water for a day.
2. The next day, you will find the seeds swollen due to the absorption of
water.

3. Now, carefully and gently remove the outer thick covering of the seed.
This is known as the outer ‘seed coat’. Inside the outer thick seed
coat, there is a thin membranous inner seed coat.

Observation : After removing both the seed coats, observe the inside of the seed.
Draw it in the space given below.

A tiny hole called micropyle allows the seed to Seed coat
absorb water. The seed coat has a little opening called Radicle
hilum. It is through hilum that the seed absorbs Plumule

water. The seed coat works as a shield to protect the Embryo
seed and the baby plant inside it. Inside the seed
coat are two thick and large parts — cotyledons or
seed leaves that store food for the growth of a new Hilum

plant. Between the two cotyledons is a structure
called embryo (baby plant) that grows to form the
new plant. The lower part of this embryo is known Cotyledons
as radical. It grows to form the root system. The Bean Seed

10 Active Science-5