The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which during pollination, brings genetically different types of pollen grains to stigma, is:

(1) Chasmogamy

(2) Cleistogamy

(3) Xenogamy

(4) Geitonogamy

Subtopic:  Pollination & Outbreeding Devices |
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A typical angiosperm embryo sac at maturity is:

(1) 7-nucleate and 7-celled

(2) 8-nucleate and 8-celled

(3) 8-nucleate and 7-celled

(4) 7-nucleate and 8-celled

Subtopic:  Pistil: Female Gametophyte |
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In some members of which of the following pairs of families, pollen grains retain their viability for months after release?

1. Poaceae; Solanaceae

2. Rosaceae; Leguminosae

3. Poaceae; Rosaceae

4. Poaceae; Leguminosae

Subtopic:  Stamen: Male Gametophyte |
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The body of the ovule is fused within the funicle at :

1. Micropyle

2. Nucellus

3. Chalaza

4. Hilum

Subtopic:  Pistil: Ovule |
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In water hyacinth and water lily, pollination takes place by:

1. Water currents only

2. Wind and water

3. Insects and water

4. Insects or wind

Subtopic:  Pollination & Outbreeding Devices |
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In some plants, the thalamus contributes to fruit formation. Such fruits are termed as

1. False fruits

2. Aggregate fruits

3. True fruits

4. Parthenocarpic fruits

Subtopic:  Seed |
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Which of the following is incorrect for wind-pollinated plants?

1. Well exposed stamens and stigma

2. Many ovules in each ovary

3. Flowers are small and not brightly colored

4. Pollen grains are light and non-sticky

Subtopic:  Pollination & Outbreeding Devices |
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Persistent nucellus in the seed is known as :

1. Tegmen

2. Chalaza

3. Perisperm

4. Hilum

Subtopic:  Seed |
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In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as:

1.  Parthenogenesis

2.  Autogamy

3.  Parthenocarpy

4.  Syngamy

Subtopic:  Fruit |
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What is the fate of the male gametes discharged in the synergid?

1. One fuses with the egg and other fuses with central cell nuclei

2. One fuses with the egg other (s) degenerate (s) in the synergid

3. All fuse with the egg

4. One fuses with the egg other (s) fuse (s) with synergid nucleus

Subtopic:  Post Pollination Events |
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