Which of the following has proved helpful in preserving pollens as fossils?

1. Pollenkit

2. Cellulosic intine

3. Oil content

4. Sporopollenin

Subtopic:  Stamen: Microsporangium |
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Winged pollen grains are present in
1 Mustard
2. Cycas
3. Mango
4. Pinus
Subtopic:  Pollination & Outbreeding Devices |
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Pollen grains can be stored for several years in liquid nitrogen having a temperature of

1. –120 °C

2. –80 °C

3. –196 °C

4. –160 °C

Subtopic:  Stamen: Male Gametophyte |
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Double fertilization is

1. Fusion of two male gametes of a pollen tube with two different eggs
2. Fusion of one male gamete with two polar nuclei
3. Fusion of two male gametes with one egg
4. Syngamy and triple fusion

Subtopic:  Double Fertilization |
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Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
1. Hydrilla
2. Yucca
3. Banana
4. Viola

Subtopic:  Pollination & Outbreeding Devices |
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Dioecy in plants prevents:

(1) Autogamy but not geitonogamy

(2) Geitonogamy but not autogamy

(3) Both autogamy and geitonogamy

(4) Neither autogamy nor geitonogamy

Subtopic:  Pollination & Outbreeding Devices |
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Flowers, which have single ovule in the ovary and are packed into inflorescence are usually pollinated by

(1) water

(2) bee

(3) wind

(4) bat

Subtopic:  Pollination & Outbreeding Devices |
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Functional megaspore in an angiosperm develops into

(1) ovule

(2) endosperm

(3) embryo sac

(4) embryo

Subtopic:  Pistil: Female Gametophyte |
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The morphological nature of the edible part of coconut is

(1) perisperm

(2) cotyledon

(3) endosperm

(4) pericarp

Subtopic:  Endosperm |
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Attractants and rewards are required for

(1) anemophily

(2) entomophily

(3) hydrophily

(4) cleistogamy

Subtopic:  Pollination & Outbreeding Devices |
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