Consider the following statements regarding monosporic development:

1. The embryo sac develops from a single megaspore.
2. The functional megaspore is usually the one at the chalazal end.
3. The nucleus of the functional megaspore divides meiotically.
4. It results in an 8-nucleate embryo sac.

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 central cell of the embryo sac:

1. It is the largest cell of the embryo sac.
2. It contains two polar nuclei.
3. It is situated below the egg apparatus.
4. It develops into the zygote 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 4 only

Consider the following statements regarding abiotic pollination:

1. Wind and water are abiotic agents.
2. Wind pollination is more common than water pollination.
3. Flowers produce large amounts of pollen to compensate for loss.
4. Abiotic pollination is highly directional and precise.

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 insect-pollinated flowers:

1. They are large, colourful, and fragrant.
2. They produce nectar as a reward.
3. Pollen grains are sticky.
4. The stigma is usually small and dry.

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 robbers:

1. They consume pollen or nectar.
2. They do not bring about pollination.
3. They are usually insects.
4. They are beneficial for the plant.

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 dioecy as an outbreeding device:

1. Male and female flowers are on different plants.
2. It prevents autogamy.
3. It prevents geitonogamy.
4. Papaya is an example of a dioecious plant.

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, 2, 3 and 4

Consider the following statements regarding the path of the pollen tube:

1. It grows through the stigma and style.
2. It enters the ovary and then the ovule through the micropyle.
3. It enters the synergid through the filiform apparatus.
4. It releases male gametes into the central cell directly.

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 technique of artificial hybridisation:

1. Emasculation is the removal of anthers.
2. Bagging prevents contamination of the stigma.
3. Mature pollen is dusted on the receptive stigma.
4. Rebagging is done to protect the developing fruit.

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, 2, 3 and 4

Consider the following statements regarding the zygote:

1. It is formed by the fusion of a male gamete with the egg.
2. It is diploid (2n).
3. It goes through a resting period before dividing.
4. It develops into the endosperm.

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 fruit wall (pericarp):

1. It develops from the wall of the ovary.
2. It can be dry (e.g., groundnut) or fleshy (e.g., mango).
3. It protects the seeds.
4. It develops from the integuments.

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