Differential Stages of Development in Monocot and Dicot Embryo

Q.

an ephemeral layer in anther wall is:

Q.

Mention the ploidy of the following:

(a) protonemal cell of a moss

(b) primary endosperm nucleus in dicot

(c) leaf cell of a moss; prothallus cell of a fern

(d) gemma cell in Marchantia

(e) meristem cell of monocot

(f) ovum of a liverwort

(g) zygote of a fern.

Q. Which option among the following has the correct sequence of stages of dicot embryogeny?

1. Proembryo, mature embryo, globular embryo, heart-shaped embryo
2. Proembryo, heart-shaped embryo, globular embryo, mature embryo
3. Heart-shaped embryo, globular embryo, proembryo, mature embryo
4. Proembryo, globular embryo, heart-shaped embryo, mature embryo

Q. Choose the incorrect statement(s) from the following statements.

I. The early stages of embryo development are different in both monocotyledons and dicotyledons.
II. Most zygotes divide only after a certain amount of endosperm is formed to ensure the nutrition to the developing embryo.
III. Endosperm is completely consumed by developing embryo before seed maturation in coconut.
IV. The zygote gives rise to the proembryo and subsequently to the globular, heart-shaped and mature embryo

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

Q. Match column I with column II and select the correct option from the given codes:

Column I	Column II
A. Parthenocarpy	(i) Seed formation without fertilization
B. Polyembryony	(ii) More than one embryo in same seed
C. Apomixis	(iii) Seedless fruits without fertilization
D. Somatic embryogenesis	(iv) Embryo develops from a somatic cells

1. A – (iv), B – (ii), C – (iii), D – (i)
2. A – (iii), B – (ii) , C – (i), D – (iv)
3. A – (i), B – (iv), C – (iii), D – (ii)
4. A – (ii), B – (iii), C – (i), D – (iv)

Q. Gastrulation involves the movement of cells that help the embryo attain new shape and morphology. These cell movements are called

1. tropic movements
2. locomotory movements
3. morphogenetic movements
4. peristaltic movements

Q. Assertion (A): During embryo development in dicots, suspensor serves as the main nutritive tissue for the embryo
Reason (R): The last cell of the suspensor at the end adjacent to the embryo is known as haustorium

1. Both A and R are false
2. Both A and R are true and R is the correct explanation of A
3. A is true but R is false
4. Both A and R are true and R is not the correct explanation of A

Q. Assertion (A): During embryo development in dicots, suspensor serves as the main nutritive tissue for the embryo
Reason (R): The last cell of the suspensor at the end adjacent to the embryo is known as haustorium

1. Both A and R are true and R is the correct explanation of A
2. A is true but R is false
3. Both A and R are true and R is not the correct explanation of A
4. Both A and R are false

Q.

Mention the ploidy of the following: protonemal cell of a moss; primary endosperm nucleus in dicot, leaf cell of a moss; prothallus cell of a fern; gemma cell in Marchantia; meristem cell of monocot, ovum of a liverwort, and zygote of a fern.

Q.

Arrange the following stages of embryo development in dicots from earliest to latest.

1. (iv)-(ii)-(i)-(iii)

2. (iii)-(i)-(ii)-(iv)

3. (i)-(ii)-(iii)-(iv)

4. (ii)-(iv)-(i)-(iii)

Q. Read the following statements related to embryogeny in plants and select the incorrect statements.

I. The early stages of embryo development are different in monocotyledons and dicotyledons.
II. Most zygotes divide only after a certain amount of endosperm is formed to ensure nutrition to the developing embryo.
III. Endosperm is completely consumed by developing embryos before seed maturation in coconut.
IV. The zygote gives rise to the proembryo and subsequently to the globular, heart-shaped and mature embryo.

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

Q. Antipodal nuclei in a typical angiospermic embryo sac is found

1. Towards micropylar end.
2. In the middle (polar) region.
3. On the lateral sides.
4. Towards chalazal end.

Q.

how does embryo recieve nutrition from endosperm?

Q. Assertion : The chalazal cells of the embryo sac is central cell.
Reason : They play nutritive role for embryo sac.

1. Assertion is false but Reason is true
2. Both assertion and reason are true and reason is a correct explanation of the assertion.
3. Both assertion and reason are true but reason is not a correct explanation of the assertion.
4. Assertion is true but Reason is false
5. Both Assertion and Reason are false

Q. Riccia gametophyte develops from spore and ends in

1. Thallus
2. Spore
3. Capsule
4. Zygote

Q.

Suspensor is the part of:

1. Mature embryo

2. Endosperm

3. Developing embryo
4. Embryo sac

Q. Assertion (A): During embryo development in dicots, suspensor serves as the main nutritive tissue for the embryo
Reason (R): The last cell of the suspensor at the end adjacent to the embryo is known as haustorium

1. Both A and R are true and R is the correct explanation of A
2. A is true but R is false
3. Both A and R are true and R is not the correct explanation of A
4. Both A and R are false

Q. Which option among the following has the correct sequence of stages of dicot embryogeny?

1. Proembryo, mature embryo, globular embryo, heart-shaped embryo
2. Heart-shaped embryo, globular embryo, proembryo, mature embryo
3. Proembryo, heart-shaped embryo, globular embryo, mature embryo
4. Proembryo, globular embryo, heart-shaped embryo, mature embryo

Q.

Mention the function of the following.
Cotyledon

Q.

Arrange the following stages of embryo development in dicots from earliest to latest.

1. (iv)-(ii)-(i)-(iii)

2. (iii)-(i)-(ii)-(iv)

3. (i)-(ii)-(iii)-(iv)

4. (ii)-(iv)-(i)-(iii)