Development of Female Gametophyte

Q. What does the egg apparatus of a mature embryo sac consist of?

1. One egg cell and one central cell
2. One egg cell and the two synergids
3. One egg cell and the two polar nuclei
4. One egg cell and the antipodal cells

Q. Which of the following options has only diploid structures with respect to flowering plants?

1. MMC, microspore, endosperm
2. Zygote, central cell, nucellus
3. Polar nuclei, PMC, PEN
4. MMC, integuments, endosperm

Q. Which of the following is/are pre-fertilisation events?

1. Development of female gametophyte
2. Microsprogenesis
3. Megasporogenesis
4. All of the above

Q. Female gametophyte is also called as

1. embryo sac
2. ovary
3. endosperm
4. microspore mother cell
   

Q.

In embryo sac, n, 2n, 3n conditions are found respectively in

1. egg, antipodal, endosperm

2. nucleus, endosperm, egg

3. antipodal, zygote, endosperm

4. endosperm, nucleus, egg

Q. What is monosporic development?

1. The method of formation of an embryo sac from a single megaspore
2. The method of formation of megaspores from a single megaspore mother cell.
3. The method of formation of microspores from a single pollen mother cell
4. The method of formation of single seed from a single ovule.

Q. The arrangement of nuclei in a normal embryo sac in dicot plants is

1. 2+4+2
2. 3+2+3
3. 2+3+3
4. 3+3+2

Q. Match column 1 with column 2 and choose the correct option.
$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{A. Microsporangium}& \text{i. Filiform apparatus}\\ \text{B. Chalaza}& \text{ii. Integuments}\\ \text{C. Synergids}& \text{iii. Endothecium}\\ \text{D. Megasporangium}& \text{iv. Antipodals}\end{array}$

1. A-ii, B-iii, C-iv, D-i
2. A- iii, B- iv, C- i, D- ii
3. A-i, B-iii, C-iv, D-ii
4. A-ii, B- i, C- iv, D- iii

Q. Assertion: A typical angiosperm embryo sac is 8-nucleate and 7-celled.
Reason: The large central cell of embryo sac has three polar nuclei.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. The assertion is true but reason is false.
4. Both assertion and reason are false.

Q.

Which of the following is the largest cell of the female gametophyte?

1. Central cell

2. Synergid

3. Egg cell

4. Antipodal cell

Q. An abnormal megaspore mother cell (MMC) has double the number of chromosomes. What will be the number of nuclei in the typical embryo sac formed from the megaspore of such a megaspore mother cell?

1. 8
2. 16
3. 12
4. 4

Q. In majority of angiosperms

1. a small central cell is present in the embryo sac
2. egg has a filiform apparatus
3. there are numerous antipodal cells
4. reduction division occurs in the megaspore mother cells

Q. Meroblastic type of embryo development takes place in

1. Ferns
2. Selaginella
3. Pinus
4. All of the above

Q. A typical angiosperm embryo sac at maturity is

1. 4 nucleate – 2 celled
2. 8 nucleate – 7 celled
3. 4 nucleate – 4 celled
4. 8 nucleate – 4 celled

Q. Functional megaspore in an angiosperm develops into:

1. Ovule
2. Endosperm
3. Embryo sac
4. Embryo

Q. A mature haploid female gametophyte has

1. 8 cells and 7 nuclei
2. 7 cells and 8 nuclei
3. 6 cells and 7 nuclei
4. 7 cells and 6 nuclei

Q. Which of the following statements is/are true?
A. Endothecium lies below the epidermal layer
B. Fusion of egg with male gamete is called apogamy.
C. Synergids are haploid.
D. The point at which funicle touches the ovule is raphe.

1. A and D only
2. A and B only
3. A and D only
4. A and C only

Q.

Identify the labelled parts in the given figure

1. (i)- Synergids, (ii)- Central cell, (iii)- Vacuole, (iv)- Egg cell, (v)- Antipodals

2. (i)- Antipodals, (ii)- Polar nuclei, (iii)- Central cell, (iv)- Egg cell, (v)- Synergids

3. (i)- Vegetative cells, (ii)- Secondary nucleus, (iii)- Egg cell, (iv)- Synergid, (v)- Filiform apparatus

4. (i)- Anterior cells, (ii)- Central cell, (iii)- Secondary nucleus, (iv)- Female gamete, (v)- Accessory cells

Q. In Pinus, only lower part of oospore is concerned with the development of embryo, such development is

1. Meroblastic
2. Periblastic
3. Mesoblastic
4. None of these

Q.

The number of (i) meiotic and (ii) mitotic divisions required for the development of 7-celled, 8-nucleate monosporic embryo sac are

1. (i) 1 & (ii) 3

2. (i) 4 & (ii) 3

3. (i) 2 & (ii) 3

4. (i) 1 & (ii) 7

Q. the megaspore mother cell is differentiated from one of the cell of the nucellus explain

Q. In the embryo of Pinus, the rosette cells lie

1. Above suspensor cells.
2. Between suspensor and embryonal cells.
3. Between Primary and secondary suspensor cells.
4. Between embryonal and apical cells.

Q.

The arrangement of the nuclei in a normal embryo sac in the dicot plants is:

1. 2+4+2

2. 3+2+3

3. 2+3+3

4. 3+3+2