Consider the following statements regarding floral rewards:

1. Nectar and pollen grains are usual rewards for insects.
2. Amorphophallus provides a safe place to lay eggs as a reward.
3. The Yucca moth lays eggs in the ovary locule of the Yucca plant.
4. Wind pollinated flowers provide abundant nectar as a reward.

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 development of the microspore:

1. The microspore mother cell undergoes meiosis to form a tetrad.
2. The microspores dissociate and develop into pollen grains.
3. The pollen grain divides meiotically to form vegetative and generative cells.
4. The vegetative cell is larger than the generative cell.

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 pistil:

1. A multicarpellary pistil has more than one carpel.
2. In a syncarpous pistil, carpels are fused (e.g., Papaver).
3. In an apocarpous pistil, carpels are free (e.g., Michelia).
4. The placenta is located inside the stigma.

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 seed dormancy:

1. It is a state of reduced metabolic activity.
2. It occurs when the seed water content is relatively high.
3. It helps the seed survive unfavourable conditions.
4. Seeds germinate when favourable conditions (moisture, oxygen, temp) 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 regarding the antipodals:

1. They are located at the micropylar end of the embryo sac.
2. They are three in number.
3. They are haploid cells.
4. They degenerate after fertilisation.

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 generative cell:

1. It is small and spindle-shaped.
2. It floats in the cytoplasm of the vegetative cell.
3. It has abundant food reserves.
4. It divides mitotically to form two male gametes.

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 nucellus:

1. It is a mass of cells enclosed within the integuments.
2. Its cells have abundant reserve food materials.
3. The embryo sac is located within the nucellus.
4. It is always completely consumed during seed development.

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 tube entry:

1. It enters the ovule through the micropyle.
2. It enters one of the synergids through the filiform apparatus.
3. It discharges two male gametes into the central cell.
4. The filiform apparatus guides the entry of the pollen tube.

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 seed viability records:

1. Lupinus arcticus seeds germinated after 10,000 years.
2. Phoenix dactylifera seeds germinated after 2,000 years.
3. Viability of most seeds is limited to a few days.
4. Seed banks use liquid nitrogen to store seeds for long periods.

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 geitonogamy:

1. It involves transfer of pollen between flowers of the same plant.
2. It is functionally cross-pollination.
3. It requires a pollinating agent.
4. It is genetically different from autogamy.

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