Irc 37 2001 Guidelines for the Design of Flexible Pavements 2nd Revision
Revision- Life Cycle of Plants 2nd March
Transcript of Revision- Life Cycle of Plants 2nd March
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Revision Life Cycles of Plants
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Beautiful and Colourful flowers that are around you
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What happen if the plants do not reproduce anymore?
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What happen to the animals that feed on these plants?
They will eventually die of hunger
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How do most flowers/plants reproduce?
Most flowering plants reproduce from seeds.
Video showing
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What are the differences between soaked and un-soaked bean?
The seeds became bigger, they grew in size and the seed coat starts to split open
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The roots became longer and grow deeper into the soil
Difference between the roots?
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Difference between the stems?
The stem became longer and leaves starts to appear
More leaves will appear and become bigger in size
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Plant Part What happen to it?Seed Grow into a young plant with leaves
Roots Grew longer and deeper into the soil
Stem Grew longer.
Leaves Start to have more leaves and grew bigger in size
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Parts and Function of a seed
Video showing
A
B
C
Label Part of the seed Function
A Baby Plant Develop into a new plant
C Seed Coat To protect the seed – protecting covering
Baby Plant
Seed Leaf
Seed Coat
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Which part of the seed will grow first?
1. Roots appear 2. Shoots appear
3. Leaves appear
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What are the conditions needed for a young plant to grow?
A seed grows into a young plant when there is enough (right amount) of
-Air
-Water
-Warmth
Video showing
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Too near the Sun
During Winter
On the mountain
During Summer
During Spring
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Suitable Conditions Unsuitable Conditions
During Summer
During Spring
On the mountain
Too near the SunDuring Winter
Right amount of warmth and water
It is either too hot or too cold for seeds to grow into young plants
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Will ALL the seeds in a fruit or plant grow and become a young plant?
Not all the seeds will have a chance to grow into young plants.
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Bala planted some seeds in a container that is filled with wet soil and place this container into his enclosed shoe rack.
He realised that the seeds starts to grow after 3 days even when they are placed in an enclosed area.
What is this process called?Why do you think that it is possible for the seeds to grow?
Answer:
Germination.It is possible because sunlight is not needed for seeds to grow into young plants.
Case Study
1:
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Is sunlight needed for the process of germination?
No. During germination, the seed only needs air, warmth and water.
Sunlight is needed only when the leaves of the plants start to grow / appear.
2nd stage of the life cycle – young adult plant stage
The leaves need sunlight in order to make food
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What will happen to the plants if the container were to be left in an enclosed area after the leaves of the young plants start to appear?
Answer:
The plant may shrivel and die because the plant is not being able to make food due to the absence of sunlight.
Case Study
2:
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Happy Revision