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

1. Pollen kit

2. Cellulosic intine

3. Oil content

4. Sporopollenin

Subtopic:  Stamen: Male Gametophyte |
 92%
From NCERT
NEET - 2018
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Winged pollen grains are present in:

1 Mustard
2. Cycas
3. Mango
4. Pinus

Subtopic:  Pollination & Outbreeding Devices |
 54%
NEET - 2018
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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 |
 95%
From NCERT
NEET - 2018
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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 |
 84%
From NCERT
NEET - 2018
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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 |
 93%
From NCERT
NEET - 2018
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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 |
 67%
From NCERT
NEET - 2017
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Functional megaspore in an angiosperm develops into

(1) ovule

(2) endosperm

(3) embryo sac

(4) embryo

Subtopic:  Pistil: Female Gametophyte |
 72%
From NCERT
NEET - 2017
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The morphological nature of the edible part of coconut is

(1) perisperm

(2) cotyledon

(3) endosperm

(4) pericarp

Subtopic:  Endosperm |
 86%
From NCERT
NEET - 2017
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Functional megaspore in an angiosperm develops into:

1.  Endosperm 2.  Embryo sac
3.  Embryo 4.  Ovule
Subtopic:  Pistil: Female Gametophyte |
 76%
From NCERT
NEET - 2017
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Attractants and rewards are required for:

1. Entomophily

2. Hydrophily

3. Cleistogamy

4. Anemophily

Subtopic:  Pollination & Outbreeding Devices |
 79%
NEET - 2017
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