Q1
What does a seed coat do?
AProtects the seed
BStores food
CGrows into roots
DNothing specific
ICSEClass 9 (ICSE)BiologyCh 6 · Topic 1
Seeds - Structure and Germination
A seed contains an embryo and stored food, and under the right conditions, it germinates to grow into a new plant.
Core concept
A seed has a seed coat (protective outer layer), an embryo (young plant), and stored food (like cotyledons) to nourish early growth.
How it works
Germination requires specific conditions - adequate water, oxygen, and suitable temperature - to activate the embryo's growth.
Why it matters
During germination, the seed absorbs water, the seed coat breaks, and the embryo's root (radicle) and shoot (plumule) begin to grow.
Key detail
Understanding seed structure and germination helps us grow plants successfully and appreciate how new plants begin their life cycle.
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• A seed has a seed coat, embryo, stored food.
• Cotyledons store food for early growth.
• Germination needs water, oxygen, suitable temperature.
• These activate the embryo's growth.
• The seed absorbs water; seed coat breaks.
• The radicle (root) grows first.
• The plumule (shoot) also begins growing.
• Understanding this helps successful plant growth.