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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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 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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In which one of the following, both autogamy and geitonogamy are prevented?

1. Wheat

2. Papaya

3. Castor

4. Maize

Subtopic:  Pollination & Outbreeding Devices |
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What type of pollination takes place in Vallisneria?

1.  Pollination occurs in submerged conditions by water.
2.  Flowers emerge above the surface of water and pollination occurs by insects.
3.  Flowers emerge above the water surface and pollen is carried by the wind.
4.  Male flowers are carried by water currents to female flowers at the surface of the water.

Subtopic:  Pollination & Outbreeding Devices |
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Which is the most common type of embryo sac in angiosperms?

1. Tetrasporic with one mitotic stage of division

2. Monosporic with three sequential mitotic divisions

3. Monosporic with two sequential mitotic divisions

4. Bisporic with two sequential mitotic divisions

Subtopic:  Pistil: Female Gametophyte |
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Plants with ovaries having only one or a few ovules, are generally pollinated by : 

1.  Butterflies 

2.  Birds 

3. Wind 

4. Bees 

Subtopic:  Pollination & Outbreeding Devices |
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What is the function of germ pore ?
1.  Absorption of water for seed germination
2.  Initiation of pollen tube
3.  Release of male gametes
4.  Emergence of radicle

Subtopic:  Pollen - Pistil Interaction |
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Which one of the following statements is wrong?
1.  Vegetative cell is larger than generative cell
2.  Pollen grains in some plants remain viable for months
3.  Intine is made up of cellulose and pectin
4.  When pollen is shed at two-celled stage, double fertilization does not take place

Subtopic:  Post Pollination Events |
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