Concept of Seed

Q. Which among the following statements is/are true?
I. All dicots have endospermic seeds.
II. All monocots have endospermic seeds.
III. Endosperm is triploid in angiosperms.
IV. Most dicots and some monocots have endospermic seeds.

1. I, II and III
2. IV only
3. III only
4. I and II

Q.

What is seed quiescence?

Q.

Why seed dormancy is important?

Q.

Why seed is the basic stone of agriculture?

Q. Which one of the following is an endospermic seed?

1. Pea
2. Bean
3. Gram
4. Cashew

Q.

In a dry seed, the embryo is in _______state.

Q. Non-endospermic seed is produced in

1. Maize
2. Castor
3. Wheat
4. Pea

Q.

Given below is a list of plants. Count the number of plants which have (i) endospermic and (ii) non-endospermic seeds.

Wheat, Pea, Bean, Rice, Castor, Groundnut, Coconut, Maize

1. (i) 4 and (ii) 4

2. (i) 3 and (ii) 5

3. (i) 2 and (ii) 6

4. (i) 5 and (ii) 3

Q.

Which of the following aspects is/are crucial for storage of seeds?

1. Dehydration

2. Dormancy

3. Both A and B

4. Presence of endosperm

Q.

Which of the following adaptations of seeds is not advantageous to angiosperms?

1. Presence of hairs and wings useful for dispersal

2. Formation of seeds with abortive embryos

3. Presence of thick protective seed coat

4. Presence of endosperm as food reserve

Q.

Identify the mismatch from the following pairs.

1. Seed coat - protection

2. Cotyledons - embryonic Leaves

3. Seed pore - absorption of water

4. Micropyle - storage area of seed

Q.

Regarding the assertion and reason, select the right option.

Assertion (A): In dicots during germination, the hypocotyl breaks the seed coat and moves in an upward direction to form the shoot system.

Reason (R): The radicle in the embryo breaks the seed coat and moves in downward direction to form root system.

1. Both A and R are true and R explains A

2. Both A and R are true but R does not explain A

3. A is true and R is false

4. Both A and R are false

Q. The inactivity of embryo in mature seed is called .

1. apomixis
2. dormancy
3. parthenocarpy
4. dehiscence

Q.

An inactive period when the embryo puts its development on hold is termed as

1. Seed germination

2. Seed dormancy

3. Seed storage

4. None of the above

Q.

Which of the following adaptations of seeds is not advantageous to angiosperms?

1. Presence of hairs and wings useful for dispersal

2. Formation of seeds with abortive embryos

3. Presence of thick protective seed coat

4. Presence of endosperm as food reserve

Q.

Exalbuminous (or) non-endospermic seeds do not consume endosperm during embryo development.

1. True

2. False

Q.

Phototropic movement of shoot and geotropic movement of root are called growth movements in plants.

1. True

2. False

Q.

An inactive period when the embryo puts its development on hold is termed as

1. Seed germination

2. Seed dormancy

3. Seed storage

4. None of the above

Q.

In __ seeds, endosperm is not completely consumed by the developing embryo.

Q.

Which one of the following statements is correct?

1. The seed in grasses is not endospermic.

2. Mango is a parthenocarpic fruit.

3. A proteinaceous aleurone layer is present in maize grain.

4. A sterile pistil is called a staminode.