Learn Multiple-Choice Questions (MCQs) on Germination and Seed Dispersal for All India Sainik School Entrance Exam Class VI General Knowledge (GK). Each question includes detailed answers and explanations. Perfect for exam preparation. Buy the complete study material now!
Germination and Seed Dispersal – MCQs for AISSEE Class 6
1. What is germination?
A) The process of dispersing seeds
B) The process by which a seed grows into a new plant
C) The process of pollination
D) The process of photosynthesis
Answer: B
Explanation: Germination is the process where a seed develops into a seedling under suitable conditions, including water, oxygen, and warmth.
2. Which of the following is NOT necessary for seed germination?
A) Water
B) Air
C) Light
D) Suitable temperature
Answer: C
Explanation: Seeds require water, oxygen, and a suitable temperature for germination, but light is not essential for all seeds.
3. The first part of a seedling to emerge during germination is the:
A) Plumule
B) Radicle
C) Cotyledon
D) Leaf
Answer: B
Explanation: The radicle is the embryonic root that emerges first to anchor the plant and absorb water.
4. What is the function of cotyledons in a seed?
A) To produce flowers
B) To store food for the developing seedling
C) To help in photosynthesis
D) To absorb water from the soil
Answer: B
Explanation: Cotyledons store food for the developing seedling until it can produce its own food through photosynthesis.
5. In which type of germination do cotyledons remain underground?
A) Epigeal
B) Hypogeal
C) Aerial
D) None of these
Answer: B
Explanation: In hypogeal germination, cotyledons remain below the soil, as seen in plants like peas.
6. Seed dispersal helps plants by:
A) Reducing competition for resources
B) Increasing pollination
C) Helping plants produce more oxygen
D) Making plants grow faster
Answer: A
Explanation: Seed dispersal ensures that seeds do not grow too close to the parent plant, reducing competition for light, water, and nutrients.
7. Which of the following is NOT a method of seed dispersal?
A) Wind
B) Water
C) Animals
D) Photosynthesis
Answer: D
Explanation: Photosynthesis is the process of making food in plants and is not related to seed dispersal.
8. Seeds of cotton and dandelion are dispersed by:
A) Water
B) Animals
C) Wind
D) Explosion
Answer: C
Explanation: Cotton and dandelion seeds have light, feathery structures that help them be carried by the wind.
9. Which of the following fruits is dispersed by water?
A) Mango
B) Coconut
C) Apple
D) Pea
Answer: B
Explanation: Coconuts have a fibrous husk that helps them float on water and be dispersed to new locations.
10. Why do some seeds have hooks or spines?
A) To store food
B) To stick to animals and get dispersed
C) To absorb more sunlight
D) To make the plant grow faster
Answer: B
Explanation: Some seeds, like burdock, have hooks or spines that attach to animal fur or human clothing, aiding in dispersal.
11. What is epigeal germination?
A) Cotyledons remain underground
B) Cotyledons emerge above the soil
C) Germination in water
D) Germination without oxygen
Answer: B
Explanation: In epigeal germination, the cotyledons come out of the soil, as seen in plants like beans.
12. What is the role of the plumule in a seedling?
A) Develops into the root
B) Stores food for the seed
C) Develops into the shoot
D) Protects the seed
Answer: C
Explanation: The plumule is the embryonic shoot that grows into the stem and leaves of the plant.
13. Which of the following helps in seed dispersal by animals?
A) Wings
B) Spines and hooks
C) Lightweight structures
D) Water-resistant covering
Answer: B
Explanation: Some seeds have spines or hooks that attach to animal fur or human clothing, allowing them to be carried away.
14. Which of these plants uses explosive action for seed dispersal?
A) Coconut
B) Pea
C) Maple
D) Mango
Answer: B
Explanation: Pea pods dry and burst open, scattering seeds through explosive action.
15. The tiny plant inside a seed is called:
A) Root
B) Seed coat
C) Embryo
D) Endosperm
Answer: C
Explanation: The embryo is the young plant inside a seed that develops into a new plant after germination.
16. Which factor triggers seed germination?
A) Water
B) Carbon dioxide
C) Sunlight
D) All of these
Answer: A
Explanation: Water is essential for seed germination as it activates enzymes that start the growth process.
17. Why do seeds need oxygen for germination?
A) To break dormancy
B) To produce energy for growth
C) To absorb water
D) To develop chlorophyll
Answer: B
Explanation: Oxygen helps seeds undergo respiration, which releases energy needed for growth.
18. Which part of the seed protects it from damage?
A) Endosperm
B) Seed coat
C) Cotyledon
D) Plumule
Answer: B
Explanation: The seed coat is the outer covering that protects the seed from damage and infection.
19. What is the main function of the seed coat?
A) To store food
B) To protect the seed
C) To absorb water
D) To help in photosynthesis
Answer: B
Explanation: The seed coat acts as a protective covering that shields the seed from damage and prevents dehydration.
20. Which of the following conditions is essential for seed germination?
A) Darkness
B) Warmth
C) High temperature
D) Dry soil
Answer: B
Explanation: Warmth is necessary for the activation of enzymes that drive the germination process.
21. What happens to the seed coat during germination?
A) It becomes harder
B) It breaks open
C) It absorbs sunlight
D) It turns into leaves
Answer: B
Explanation: The seed coat breaks open to allow the emerging radicle and plumule to grow.
22. Which plant disperses its seeds through explosion?
A) Coconut
B) Pea
C) Mango
D) Pineapple
Answer: B
Explanation: Pea pods dry out and burst open to scatter seeds forcefully.
23. Which part of the plant grows first during germination?
A) Plumule
B) Cotyledon
C) Radicle
D) Leaf
Answer: C
Explanation: The radicle grows first to anchor the seedling and absorb water from the soil.
24. How do coconut seeds disperse?
A) Wind
B) Water
C) Animals
D) Explosion
Answer: B
Explanation: Coconut seeds have a fibrous husk that helps them float on water and disperse to different locations.
25. Which of the following seeds is dispersed by wind?
A) Apple
B) Dandelion
C) Coconut
D) Mango
Answer: B
Explanation: Dandelion seeds have feathery structures that help them be carried by the wind.
26. Why do seeds disperse away from the parent plant?
A) To reduce competition for resources
B) To grow faster
C) To produce more oxygen
D) To avoid sunlight
Answer: A
Explanation: Seed dispersal helps reduce competition for light, water, and nutrients among plants.
27. What type of seed dispersal is seen in maple seeds?
A) Wind
B) Water
C) Animals
D) Explosion
Answer: A
Explanation: Maple seeds have wing-like structures that allow them to be carried by the wind.
28. Which factor is NOT essential for seed germination?
A) Water
B) Soil
C) Oxygen
D) Suitable temperature
Answer: B
Explanation: Seeds do not necessarily need soil to germinate; they can grow in moist conditions without soil.
29. Which part of the seed stores food for the growing seedling?
A) Radicle
B) Plumule
C) Cotyledon
D) Seed coat
Answer: C
Explanation: Cotyledons store food that nourishes the young seedling until it can perform photosynthesis.
30. Which type of seed dispersal is used by lotus seeds?
A) Wind
B) Water
C) Animals
D) Explosion
Answer: B
Explanation: Lotus seeds float on water and are carried to different locations for germination.
31. How do animals help in seed dispersal?
A) By eating fruits and excreting seeds elsewhere
B) By blowing the seeds in the air
C) By storing seeds underground only
D) By using seeds as nests
Answer: A
Explanation: Animals eat fruits, and the seeds pass through their digestive systems and are excreted in new locations.
32. Why do seeds need water for germination?
A) To make them heavier
B) To break dormancy and activate enzymes
C) To dissolve oxygen
D) To speed up photosynthesis
Answer: B
Explanation: Water activates enzymes that break down stored food, providing energy for germination.
33. Which type of dispersal is common in mango seeds?
A) Wind
B) Water
C) Animals
D) Explosion
Answer: C
Explanation: Mango seeds are inside a fleshy fruit, which is eaten by animals, leading to seed dispersal.
34. Which plant’s seeds have wings for wind dispersal?
A) Coconut
B) Cotton
C) Maple
D) Mango
Answer: C
Explanation: Maple seeds have wing-like structures that help them glide through the air with the wind.
35. What is the purpose of dormancy in seeds?
A) To help seeds survive unfavorable conditions
B) To produce more oxygen
C) To increase seed weight
D) To speed up germination
Answer: A
Explanation: Dormancy helps seeds survive extreme conditions by delaying germination until favorable conditions return.
36. What is the function of endosperm in a seed?
A) Protects the seed from insects
B) Stores food for the embryo
C) Helps in seed dispersal
D) Absorbs water during germination
Answer: B
Explanation: The endosperm is a tissue that stores food for the embryo until it starts making its own food.
37. Which of these plants use explosive seed dispersal?
A) Sunflower
B) Balsam
C) Lotus
D) Apple
Answer: B
Explanation: Balsam plants disperse their seeds by explosion, flinging them away from the parent plant.
38. How does wind help in seed dispersal?
A) By carrying heavy seeds
B) By carrying light seeds with special structures
C) By absorbing moisture from seeds
D) By making seeds germinate quickly
Answer: B
Explanation: Wind disperses seeds that are lightweight and have special structures like wings or fluff.
39. What is the role of the micropyle in a seed?
A) It allows water to enter the seed
B) It protects the seed from damage
C) It helps in photosynthesis
D) It is responsible for seed dispersal
Answer: A
Explanation: The micropyle is a tiny pore in the seed coat that allows water to enter for germination.
40. Which of the following is NOT an agent of seed dispersal?
A) Wind
B) Water
C) Sunlight
D) Animals
Answer: C
Explanation: Sunlight helps in plant growth but does not play a direct role in seed dispersal.
41. Which of the following is a seed dispersed by water?
A) Mango
B) Pea
C) Coconut
D) Sunflower
Answer: C
Explanation: Coconuts have a waterproof husk that enables them to float and be dispersed by water.
42. Why do some seeds have a hard seed coat?
A) To store food
B) To protect the seed from damage and dehydration
C) To absorb sunlight
D) To help in seed dispersal
Answer: B
Explanation: A hard seed coat protects the seed from harsh environmental conditions and prevents water loss.
43. In which type of germination do cotyledons emerge above the soil?
A) Hypogeal
B) Epigeal
C) Aerial
D) None of these
Answer: B
Explanation: In epigeal germination, the cotyledons emerge above the soil, as seen in beans.
44. How do birds help in seed dispersal?
A) By eating fruits and excreting seeds elsewhere
B) By pecking seeds and throwing them away
C) By breaking seeds open
D) By carrying seeds in their beaks for long distances
Answer: A
Explanation: Birds eat fruits, and the seeds pass through their digestive system and are excreted in new locations.
45. Why is seed dispersal important for plants?
A) It helps plants grow taller
B) It helps plants avoid competition for resources
C) It increases the size of seeds
D) It reduces the need for water
Answer: B
Explanation: Seed dispersal prevents overcrowding and competition for light, water, and nutrients.
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