Consider the following statements regarding hybrid seeds and apomixis:

1. Hybrid seeds must be produced every year due to segregation.
2. Apomixis prevents the segregation of characters.
3. Apomictic seeds are genetically identical to the parent.
4. Farmers can reuse apomictic seeds, reducing costs.

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 Parthenium hysterophorus:

1. It is commonly known as carrot grass.
2. It was introduced in India as a contaminant with imported wheat.
3. It causes pollen allergy.
4. It is rare and found only in specific regions of India.

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 pollen banks:

1. Pollen is stored in liquid nitrogen.
2. The storage temperature is -100 degrees Celsius.
3. Stored pollen remains viable for years.
4. They are used in crop breeding programmes.

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 angiosperm anther:

1. It is generally bilobed.
2. Each lobe is dithecous (has two theca).
3. It contains two microsporangia in total.
4. A longitudinal groove often separates the theca.

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 tapetum:

1. It is the innermost wall layer of the microsporangium.
2. It nourishes the developing pollen grains.
3. Its cells have sparse cytoplasm and no nucleus.
4. Its cells are often binucleate or multinucleate.

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 sporogenous tissue:

1. It occupies the centre of each microsporangium.
2. Its cells are haploid.
3. Each cell is a potential pollen mother cell (PMC).
4. Cells undergo meiosis to form microspore tetrads.

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 sporopollenin:

1. It constitutes the exine of pollen grains.
2. It is resistant to enzymes, acids, and high temperatures.
3. It helps in fossilization of pollen.
4. It is present continuously over the entire pollen surface.

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 generative cell:

1. It is small and spindle-shaped.
2. It has dense cytoplasm and a nucleus.
3. It divides meiotically to form male gametes.
4. It floats in the cytoplasm of the vegetative 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 gynoecium:

1. Michelia has a multicarpellary apocarpous gynoecium.
2. Papaver has a multicarpellary syncarpous gynoecium.
3. Apocarpous means carpels are fused.
4. Syncarpous means carpels are free.

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 parts of the ovule:

1. The funicle is the stalk attaching the ovule to the placenta.
2. The hilum is the junction between the funicle and the ovule body.
3. The micropyle is the basal part of the ovule.
4. The nucellus provides nutrition to 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 3 only