Consider the following statements about pollen tube growth:

1. It grows through the tissues of the stigma and style.
2. In 2-celled pollen, the generative cell divides in the pollen tube.
3. In 3-celled pollen, the tube carries two male gametes from the start.
4. The pollen tube reaches the ovary and enters the ovule through the funicle.

Which of the above statements are correct?

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

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

Consider the following statements regarding the Primary Endosperm Nucleus (PEN):

1. It is formed in the central cell.
2. It is the result of the fusion of one polar nucleus and one male gamete.
3. It is triploid in nature.
4. It divides to form the endosperm tissue.

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 zygote:

1. It is formed by syngamy.
2. It is located at the micropylar end of the embryo sac.
3. It divides immediately after formation without any resting period.
4. It gives rise to the proembryo.

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 about the dicot embryo:

1. It consists of an embryonal axis and two cotyledons.
2. The epicotyl is the portion above the cotyledons.
3. The plumule is the tip of the hypocotyl.
4. The root tip is covered by a root cap.

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 fruit development:

1. The pericarp can be dry or fleshy.
2. Groundnut and mustard have fleshy fruits.
3. Guava and mango have fleshy fruits.
4. Fruit dispersal mechanisms are evolved in many plants.

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 about perisperm:

1. It is derived from the integuments.
2. It is found in seeds of black pepper.
3. It represents persistent nucellus.
4. It is a triploid tissue.

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 release of male gametes:

1. They are released into the central cell.
2. They are released into the cytoplasm of the synergid.
3. They are motile and swim to the egg.
4. Two male gametes are released by one pollen tube.

Which of the above statements are correct?

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

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

Consider the following statements regarding seed dormancy:

1. It is a state of inactivity of the embryo.
2. It occurs when water content is high.
3. It helps seeds survive through unfavorable seasons.
4. Seeds germinate when favourable conditions return.

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 about polyembryony:

1. It is the formation of multiple embryos in a single seed.
2. It is common in Mango and Citrus varieties.
3. The embryos arise from the differentiation of the zygote.
4. Some embryos arise from nucellar cells protruding into the 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 4 only

Consider the following statements regarding false fruits:

1. They develop only from the ovary.
2. The thalamus becomes fleshy and edible.
3. Apple and pear are false fruits.
4. Cashew nut involves the thalamus in fruit formation.

Which of the above statements are correct?

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

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