Consider the following statements regarding the structure of the anther:

1. The epidermis is the outermost layer.
2. The middle layers are located between the endothecium and tapetum.
3. The tapetum is the innermost layer.
4. The sporogenous tissue is located between the epidermis and endothecium.

Which of the above statements are correct?

[Sexual-Reproduction-in-Flowering-Plants] [class-xii]

• 1, 2 and 3
• 1, 2 and 4
• 2, 3 and 4
• 1 and 4 only

Consider the following statements regarding pollen grain shedding:

1. In 60 percent of angiosperms, pollen is shed at the 2-celled stage.
2. In 40 percent of angiosperms, pollen is shed at the 3-celled stage.
3. The 3-celled stage contains one vegetative cell and two male gametes.
4. The generative cell divides meiotically to form male gametes.

Which of the above statements are correct?

[Sexual-Reproduction-in-Flowering-Plants] [class-xii]

• 1, 2 and 3
• 1, 3 and 4
• 2, 3 and 4
• 1 and 4 only

Consider the following statements regarding the integuments:

1. They are protective envelopes of the ovule.
2. They encircle the nucellus completely without any opening.
3. They harden to form the seed coat after fertilisation.
4. The outer integument forms the testa.

Which of the above statements are correct?

[Sexual-Reproduction-in-Flowering-Plants] [class-xii]

• 1, 2 and 3
• 1, 3 and 4
• 2, 3 and 4
• 1 and 4 only

Consider the following statements regarding the synergids:

1. They are part of the egg apparatus.
2. They are haploid cells.
3. They possess the filiform apparatus at the chalazal end.
4. They degenerate after fertilisation.

Which of the above statements are correct?

[Sexual-Reproduction-in-Flowering-Plants] [class-xii]

• 1, 2 and 3
• 1, 2 and 4
• 2, 3 and 4
• 1 and 3 only

Consider the following statements regarding pollination in Vallisneria:

1. It is a fresh water plant.
2. Female flowers remain submerged in water.
3. Pollen grains are released onto the surface of the water.
4. Pollination occurs passively by water currents.

Which of the above statements are correct?

[Sexual-Reproduction-in-Flowering-Plants] [class-xii]

• 1, 2 and 3
• 1, 3 and 4
• 2, 3 and 4
• 1 and 4 only

Consider the following statements regarding self-incompatibility:

1. It prevents self-pollen from fertilising the ovules.
2. It inhibits pollen germination on the stigma.
3. It inhibits pollen tube growth in the pistil.
4. It is a morphological mechanism to prevent inbreeding.

Which of the above statements are correct?

[Sexual-Reproduction-in-Flowering-Plants] [class-xii]

• 1, 2 and 3
• 1, 2 and 4
• 2, 3 and 4
• 1 and 4 only

Consider the following statements regarding the central cell:

1. It is the largest cell of the embryo sac.
2. It contains two polar nuclei.
3. It becomes the Primary Endosperm Cell (PEC) after triple fusion.
4. It develops into the zygote.

Which of the above statements are correct?

[Sexual-Reproduction-in-Flowering-Plants] [class-xii]

• 1, 2 and 3
• 1, 2 and 4
• 2, 3 and 4
• 1 and 4 only

Consider the following statements regarding free-nuclear endosperm:

1. It is the most common type of endosperm development.
2. The PEN undergoes nuclear divisions not immediately followed by cell wall formation.
3. Coconut water is an example of free-nuclear endosperm.
4. It eventually becomes cellular in all plants.

Which of the above statements are correct?

[Sexual-Reproduction-in-Flowering-Plants] [class-xii]

• 1, 2 and 3
• 1, 2 and 4
• 2, 3 and 4
• 1 and 4 only

Consider the following statements regarding the epicotyl:

1. It is part of the embryonal axis.
2. It is located above the level of cotyledons.
3. It terminates with the radicle.
4. In monocots, it has a shoot apex enclosed in a coleoptile.

Which of the above statements are correct?

[Sexual-Reproduction-in-Flowering-Plants] [class-xii]

• 1, 2 and 3
• 1, 2 and 4
• 2, 3 and 4
• 1 and 3 only

Consider the following statements regarding polyembryony:

1. It refers to the occurrence of more than one embryo in a seed.
2. It is common in groundnut and pea.
3. It can arise from nucellar cells in Citrus.
4. Apomictic embryos are genetically identical to the parent.

Which of the above statements are correct?

[Sexual-Reproduction-in-Flowering-Plants] [class-xii]

• 1, 2 and 3
• 1, 3 and 4
• 2, 3 and 4
• 1 and 4 only