Page 11 - Syok Praktis PBD (2023) Science TH4

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Practice Theme 2 Life Science

4 Plants

SYOK Study

4.1 Plant Responses to Stimuli (c) Response to touch
• Some plants respond to touch. For example,
1. Plants do not move like animals. the mimosa pudica plant would closes its
2. Plants respond to external stimuli as shown leaves when touched to protect itself.
below:

Part of the Plant Type of Stimulus
Root Water and
gravitational pull
Leaf Touch

Shoot Light
(d) Response to gravity
(a) Response to water • The root grows into the ground in the direction
• The root of the plant responds to water and of gravitational pull.
gravitational pull.
4.2 Photosynthesis
Porous clay
container 1. Green plants are able to make their own food
through the photosynthesis process.

Air
Light energy
Oxygen
Roots bend
towards water
Carbon dioxide
(b) Response to light
• The shoot of the plant moves towards the
direction of the light. Water

Chlorophyll
Light
Sunlight

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