Seed germination

Seed Germination and Life Cycles – Assignment

Question 1: Does it grow?

S. no.	Does it grow?	Does it respire?	Example	Remarks
1	Yes	Yes	Plant	Living thing
2	No	No	Rock	Non-living thing

Question 2: Diagram of a seed

Below is a labeled diagram showing the structure of a seed: embryo, endosperm, and seed coat.

Embryo

Endosperm

Seed Coat

Question 3: Use of seed germination knowledge for grain storage

To store grains and pulses properly, we need to keep them in a cool, dry place. Seeds need moisture, warmth, and oxygen to germinate. Controlling these factors helps prevent spoilage. Airtight containers help maintain dryness.

Question 4: Advantage of tail in tadpole stage

The tail provides propulsion and balance in water, helping tadpoles swim and find food effectively.

Question 5: Charan and Charu's statements

I agree with Charan that a wooden log is non-living. It no longer grows or responds like a living tree. Once harvested, it loses the traits of living organisms.

Question 6: Life cycles of a mosquito and a frog

Mosquitoes undergo complete metamorphosis: egg → larva → pupa → adult. Frogs undergo incomplete metamorphosis: egg → tadpole → adult. Both show significant changes in form during development.

Question 7: Drawing of a plant after one week

After one week, the shoot grows taller with leaves, and the root develops hairs to absorb water. The plant begins photosynthesis.

Question 8: Tara and Vijay's experiment

They want to test how different conditions (light, water, temperature) affect seed germination. They'll know by observing the number of seeds that sprout under each condition.

Question 9: Temperature experiment

• Use 4 sets of bean seeds at 10°C, 20°C, 30°C, and 40°C
• Keep seeds moist and provide light
• Observe germination over 7 days

Expected Outcome: Best germination at 20°C–30°C. Low at 10°C; possibly too high at 40°C.

Conclusion: Helps identify optimal temperature for germination.