Development of Endosperm

Q.

Perisperm differs from endosperm in:

1. Its formation by fusion of secondary nucleus with several sperms

2. Being a diploid tissue

3. Having no reserve food

4. Being a haploid tissue

Q.

Question 05
Give two differences between a zygote and a foetus.

Q. In humans, the development of fertilised egg takes place in the __________.

1. ovary
2. uterus
3. vagina
4. testes

Q. In humans, the development of fertilised egg takes place in the __________.

1. ovary
2. uterus
3. vagina
4. testes

Q. Assertion :Maize is called "pampered corn". Reason: Maize lacks natural defence system.

1. if both Assertion and Reason are true and Reason is the correct explanation of Assertion
2. if both Assertion and Reason are true but Reason is not the correct explanation of Assertion
3. if Assertion is true but Reason is false
4. if both Assertion and Reason are false

Q.

Ploidy level of endosperm in angiosperms is generally

1. n

2. 6n

3. 2n

4. 3n

Q.

The milky water in tender coconut is free __ endosperm.

Q.

Coconut water from a tender coconut is:

1. Degenerated nucellus

2. Immature embryo

3. Free nuclear endosperm

4. Innermost layers of the seed coat

Q. Milky water of tender coconut is

1. liquid gametes
2. liquid endosperm
3. liquid female gametophyte
4. liquid embryo
   
   

Q. Write the scientific name of following animals and plants.
a) Coconut
b) Wheat
c) Crow
d) Mango
e) Paddy

Q. Define cloning. Which process was used for cloning Dolly? [1 mark]

Q. Coconut water from a tender coconut is ___.

1. free nuclear endosperm
2. innermost layers of the seed coat
3. degenerated nucellus
4. immature embryo

Q. Study the following statements and select the correct option.
A. Tapetum nourishes the developing pollen grains
B. Hilum represents the junction between ovule and funicle
C. In aquatic plants such as water hyacinth and water lily, pollination is by water.
D. The primary endosperm nucleus is triploid

1. A and B are correct but C and D are incorrect
2. A, B and D are correct but C is incorrect
3. B, C and D are correct but A is incorrect
4. A and D are correct but B and C are incorrect

Q.

What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells?

1. 63

2. 84

3. 42

4. 21

Q.

The most common type of endosperm development is

1. Cellular type

2. Cell Helobial type

3. Helobial type

4. Nuclear type

Q.

In the life cycle of angiosperms, free nuclear divisions occur during the development of

1. Endosperm

2. Embryo

3. Embryo Sac

4. Both B & C

Q.

Perisperm differs from endosperm in:

1. Being a haploid tissue

2. Having no reserve food

3. Being a diploid tissue

4. Its formation by fusion of secondary nucleus with several sperms

Q.

Regarding the assertion and reason, select the right option.

Assertion (A): Endosperm development precedes embryo development.

Reason(R): Endosperm provides assured nutrition to the developing embryo.

1. Both A and R are true and R does not explain A

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

3. A is true and R is false

4. Both A and R are false