Concept of Seed

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. Hilum is a scar on the:

1. Seed, where micropyle was present
2. Seed, where funicle was attached
3. Fruit, where it was attached to pedicel
4. Fruit, where style was present

Q. If a diploid egg cell fuses with the male gamete produced by a diploid male plant, then what will be the ploidy of the resulting embryo?

1. 5n
2. 3n
3. 2n
4. 4n

Q. What is an endosperm mother cell?

1. Antipodal cell and the nuclei
2. Central cell and its two polar nuclei
3. Ovary
4. Mature embryo sac

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

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

Q.

Perisperm differs from endosperm in

1. being a diploid tissue

2. having no reserve food

3. its formation by fusion of secondary nucleus with several sperms

4. being a haploid tissue

Q.

Seed coat is not thin membranous in:

1. Maize

2. Coconut

3. Groundnut

4. Gram

Q. Q). Seed coat is not thin, membranous in
(1) Coconut
(2) Groundnut
(3) Gram
(4) Maize

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.

The amount of water present in a dry mature seed is around

1. 80-95$\%$

2. 10-15$\%$

3. 70-90$\%$

4. 85-90$\%$

Q.

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

1. True

2. False