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Q1. The tiny baby plant inside a seed is called the: 5th Science
The embryo is the tiny baby plant inside the seed. It grows into a new plant when it gets water, air, and warmth.
Q2. The two fleshy parts of a bean seed that store food for the baby plant are called: 5th Science
Cotyledons are like food packets. They store starch and protein for the baby plant until it can make its own food.
Q3. The hard outer covering of a seed that protects the baby plant inside is called the: 5th Science
The seed coat is like a jacket. It protects the delicate embryo from drying, insects, and injury.
Q4. What is germination? 5th Science
Germination begins when a seed gets water, air, and warmth. The seed coat breaks open, and a tiny root and shoot come out.
Q5. Which of the following is NOT needed for a seed to germinate? 5th Science
Seeds can germinate in darkness. They use stored food from cotyledons. Sunlight is needed only after the baby plant grows leaves.
Q6. Why does a seed need water to germinate? 5th Science
Water enters the seed through a tiny hole, softens the seed coat, and wakes up the embryo. The embryo then begins to grow.
Q7. A seed kept in an airtight jar will not germinate because: 5th Science
Seeds need oxygen from the air to breathe and release energy from their stored food. Without air, the seed dies.
Q8. Most seeds germinate best when the temperature is: 5th Science
Warmth speeds up the chemical reactions inside the seed. If it is too cold, the seed remains asleep and does not germinate.
Q9. If you put a seed in a dark cupboard with water and air, it will: 5th Science
Sunlight is not necessary for germination. The seed uses food stored in its cotyledons to grow in the dark.
Q10. The part of the seed that grows into the root first is called the: 5th Science
The radicle is the first part to come out of the seed. It grows downward into the soil to become the root.
Q11. The part of the seed that grows into the shoot (stem and leaves) is called the: 5th Science
The plumule grows upward toward the sunlight. It becomes the stem and the first leaves of the new plant.
Q12. Seeds of dandelion and cotton have fluffy hairs. How are they dispersed? 5th Science
The fluffy hairs act like tiny parachutes. The wind catches them and carries the seeds to faraway places.
Q13. A coconut seed can float on water and travel to new islands. How is it dispersed? 5th Science
Coconut has a spongy, fibrous covering that traps air. This makes it light enough to float on rivers and seas.
Q14. Seeds of mango and guava are dispersed by: 5th Science
Animals and birds eat the tasty fruit and throw away or drop the seed. Sometimes the seed passes through their body and comes out in a new place.
Q15. Seeds of cocklebur and Xanthium have tiny hooks. They stick to: 5th Science
The hooks catch onto the fur of animals or the clothes of people. The seed is carried to a new place and falls off later.
Q16. Which plant scatters its seeds by explosion? 5th Science
The fruit of balsam dries up and suddenly bursts open with a pop. The seeds are thrown in all directions. This is called explosive dispersal.
Q17. Pea and bean pods also scatter their seeds by: 5th Science
When a pea or bean pod dries, it twists and splits open suddenly. The seeds pop out and fall some distance away from the parent plant.
Q18. A seed will NOT germinate if the temperature is too cold because: 5th Science
Cold temperatures slow down or stop the chemical reactions inside the seed. The seed stays dormant (asleep) until it gets warmth.
Q19. Which of the following helps a seed to be dispersed by wind? 5th Science
Wings (like in maple seeds) and fluffy hairs (like in dandelion) help seeds stay in the air longer so the wind can carry them far.
Q20. Put the following in the correct order for germination: (1) Seed coat breaks open, (2) Seed gets water, (3) Radicle comes out 5th Science
First, the seed gets water. The water softens the seed coat, so it breaks open. Then, the radicle (tiny root) comes out first.
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