Consider the following statements regarding pollination types:

1. Autogamy transfers pollen to the stigma of the same flower.
2. Geitonogamy is genetically similar to autogamy.
3. Xenogamy ensures the transfer of genetically different pollen.
4. Cleistogamous flowers are invariably xenogamous.

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 cleistogamy:

1. It occurs in plants like Viola, Oxalis, and Commelina.
2. Flowers do not open at all.
3. It requires external pollinators to ensure fruit set.
4. It produces assured seed-set even in the absence of pollinators.

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 wind pollination:

1. Pollen grains are light and non-sticky.
2. Stigma is often large and feathery.
3. Flowers usually have a single ovule in each ovary.
4. Flowers are large, colorful, and rich in nectar.

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 water pollination:

1. It is limited to about 30 genera, mostly monocotyledons.
2. In Vallisneria, female flowers reach the surface to receive floating pollen.
3. In Seagrasses, pollination occurs on the water surface.
4. Pollen grains of water-pollinated species are protected by a mucilaginous covering.

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 pollination:

1. Flowers are large, colourful, fragrant, and rich in nectar.
2. Flies and beetles are attracted by foul odours.
3. Pollen grains are generally sticky.
4. The yucca moth lays eggs in the style of the flower.

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 outbreeding devices:

1. Non-synchronisation of pollen release and stigma receptivity prevents autogamy.
2. Placing anther and stigma at different positions prevents autogamy.
3. Self-incompatibility is a genetic mechanism preventing self-fertilisation.
4. Monoecious plants prevent both autogamy and geitonogamy.

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-pistil interaction:

1. It is a dynamic process involving pollen recognition.
2. Compatible pollen hydrates and germinates on the stigma.
3. Pollen tube growth is guided by chemical components.
4. Incompatible pollen is rejected after the pollen tube enters the ovary.

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 artificial hybridisation:

1. Emasculation is the removal of anthers from a bisexual flower bud.
2. Bagging prevents contamination of the stigma by unwanted pollen.
3. Emasculation is essential for unisexual female flowers.
4. Rebagging is done after dusting desired pollen on 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 3 only

Consider the following statements regarding double fertilisation:

1. The pollen tube releases two male gametes into the synergid.
2. One male gamete fuses with the egg cell (Syngamy).
3. The other male gamete fuses with the central cell nucleus (Triple Fusion).
4. The Primary Endosperm Nucleus (PEN) formed is diploid.

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 post-fertilisation events:

1. The zygote develops into the embryo.
2. The primary endosperm cell develops into the endosperm.
3. The ovary develops into the seed.
4. The ovule develops into the fruit.

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