Page 11 - Active Science 5 Ebook and Activity

upper part of the embryo is known as plumule Cotyledons
that grows to form the shoot system of the new

plant.
Plumule
Some seeds like beans, pulses, peas have two
cotyledons; and some like rice, maize and wheat
have a single cotyledon.

All seeds cannot grow into plants. Some of them

are eaten by birds or animals and some may die
due to harsh weather conditions. Radicle

Germination of seed
Germination of Seeds
A seed needs water, air and suitable temperature to grow and form a new plant. The

process by which a seed grows into a new plant is known as germination.

Activity 1.2

Aim : To understand the conditions required for seed germination.
Materials Required : Three bean seeds, water, beaker, three glass strips and a thread.
Procedure : 1. Take three bean seeds.

2. Mark them as A, B and C.
3. Tie the seeds attached to a glass strip with the help of a thread.
4. Take a beaker, half filled with water.

5. Now put the slides with the seeds in the beaker in such a way that
seed A gets completely soaked in water, seed B is partly in water
and partly in air and seed C is completely in the air as shown in the

A figure.

B C B (After 2-3 days)

6. Leave the beaker in a moderately warm place (temperature about
o
37 C).
• Observe the seeds after 2 to 3 days.

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Active Science-5