Consider the following statements regarding the fruit wall:

1. It is called the pericarp.
2. It develops from the wall of the ovule.
3. It can be fleshy or dry.
4. It protects the seeds and helps in dispersal.

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 layers of the microsporangium wall:

1. The epidermis and endothecium are the outer protective layers.
2. The middle layers help in the dehiscence of the anther.
3. The tapetum is the innermost layer that nourishes pollen grains.
4. Cells of the tapetum usually have a single nucleus and sparse cytoplasm.

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 2 only

Consider the following statements regarding the pollen grain wall:

1. The exine is the hard outer layer made of sporopollenin.
2. Sporopollenin is degraded by high temperatures and strong acids.
3. The intine is the inner wall made of cellulose and pectin.
4. Germ pores are apertures on the exine where sporopollenin is absent.

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 cells within a mature pollen grain:

1. The vegetative cell is larger and has abundant food reserve.
2. The generative cell is spindle-shaped and floats in the vegetative cell's cytoplasm.
3. The vegetative cell has a small, circular nucleus.
4. In 60 per cent of angiosperms, pollen is shed at the 2-celled stage.

Which of the above statements are correct?

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

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

Consider the following statements regarding pollen viability:

1. It depends on prevailing temperature and humidity.
2. In Rice and Wheat, viability lasts for several months.
3. In Rosaceae and Solanaceae, viability is lost within 30 minutes.
4. Pollen can be stored in liquid nitrogen for years.

Which of the above statements are correct?

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

• 1 and 2
• 2 and 3
• 3 and 4
• 1 and 4

Consider the following statements regarding the structure of the ovule:

1. The hilum represents the junction between the ovule and funicle.
2. The integuments completely encircle the nucellus without any opening.
3. The chalaza represents the basal part of the ovule.
4. The micropyle is located opposite to the chalazal end.

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 megasporogenesis:

1. The Megaspore Mother Cell (MMC) is a large diploid cell.
2. The MMC undergoes meiosis to form four megaspores.
3. All four megaspores develop into functional embryo sacs in most plants.
4. The process occurs in the micropylar region of the nucellus.

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 the embryo sac:

1. It is formed by monosporic development in majority of flowering plants.
2. The mature embryo sac is 8-nucleate and 7-celled.
3. The polar nuclei are situated in the egg apparatus.
4. The antipodals are located at the chalazal end.

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 the filiform apparatus:

1. It consists of special cellular thickenings.
2. It is located at the micropylar tip of the synergids.
3. It guides the pollen tube into the egg cell directly.
4. It plays a role in the entry of the pollen tube into the synergid.

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 cleistogamous flowers:

1. They do not open at all.
2. They are invariably autogamous.
3. They require external pollinators for seed set.
4. Viola and Oxalis produce these flowers.

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