Practice important
Seed Germination
MCQ questions and answers.
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10
MCQ Questions
1. What is the first step in the germination of a dry seed?
A.
Absorption of water
B.
Formation of flowers
C.
Production of fruits
D.
Release of pollen
Correct Answer:
Absorption of water
Explanation:
A dry seed begins germination by absorbing water through imbibition. This causes the seed to swell and activates its metabolism.
2. Which process allows a dry seed to take up water during germination?
A.
Imbibition
B.
Pollination
C.
Transpiration
D.
Photosynthesis
Correct Answer:
Imbibition
Explanation:
Imbibition is the absorption of water by hydrophilic substances in the seed, such as cell walls and storage materials, during germination.
3. What happens to a seed after it imbibes water?
A.
It swells
B.
It becomes completely dry
C.
It produces pollen immediately
D.
It changes into a fruit
Correct Answer:
It swells
Explanation:
Water absorbed by the seed during imbibition causes its tissues to swell, helping initiate the events of seed germination.
4. Which part usually emerges first from a germinating seed?
A.
Radicle
B.
Flower
C.
Fruit
D.
Leaf margin
Correct Answer:
Radicle
Explanation:
The radicle, or embryonic root, commonly emerges first during germination and anchors the young plant while absorbing water.
5. Why is water essential for seed germination?
A.
It activates enzymes and metabolic activities
B.
It directly produces sunlight
C.
It changes the seed into a flower
D.
It prevents the embryo from growing
Correct Answer:
It activates enzymes and metabolic activities
Explanation:
Water absorbed during imbibition activates enzymes and metabolic processes needed for the embryo to grow during germination.
6. Which seed material can absorb water by imbibition during germination?
A.
Cell walls
B.
Pollen grains only
C.
Flower petals only
D.
Fruit juice only
Correct Answer:
Cell walls
Explanation:
Seed cell walls contain hydrophilic substances that absorb water by imbibition when the seed begins to germinate.
7. What is the main role of imbibition in seed germination?
A.
It starts the activation of the seed embryo
B.
It produces mature fruits
C.
It prevents water from entering the seed
D.
It stops enzyme activity
Correct Answer:
It starts the activation of the seed embryo
Explanation:
Imbibition supplies water to the dry seed, causing swelling and initiating enzyme activity and embryo growth.
8. A dry gram seed becomes larger after being soaked in water. Which process explains this change?
A.
Imbibition
B.
Respiration only
C.
Pollination
D.
Translocation
Correct Answer:
Imbibition
Explanation:
A gram seed enlarges because its hydrophilic seed components absorb water. This water uptake is called imbibition.
9. Which structure develops from the radicle during seed germination?
A.
Primary root
B.
Flower
C.
Fruit wall
D.
Pollen tube
Correct Answer:
Primary root
Explanation:
The radicle is the embryonic root of the seed and develops into the primary root after it emerges during germination.
10. What is a visible result of water absorption by a dry seed during germination?
A.
The seed coat may rupture
B.
The seed becomes smaller
C.
The seed produces pollen
D.
The embryo dies immediately
Correct Answer:
The seed coat may rupture
Explanation:
Water uptake causes the seed to swell, which can rupture the seed coat and allow the radicle to emerge during germination.
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Seed Germination
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