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Q. No.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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Subtopic: Pollination & Outbreeding Devices |
53%
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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In the majority of angiosperms:
| 1. | egg has a filiform apparatus |
| 2. | there are numerous antipodal cells |
| 3. | reduction division occurs in the megaspore mother cells |
| 4. | a small central cell is present in the embryo sac |
Subtopic: Pistil: Female Gametophyte |
77%
From NCERT
NEET - 2016
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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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The ovule of an angiosperm is technically equivalent to:
1. megasporangium
2. megasporophyll
3. megaspore mother cell
4. megaspore
1. megasporangium
2. megasporophyll
3. megaspore mother cell
4. megaspore
Subtopic: Pistil: Ovule |
70%
From NCERT
NEET - 2016
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Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:
| 1. | Bee | 2. | Wind |
| 3. | Bat | 4. | Water |
Subtopic: Pollination & Outbreeding Devices |
76%
From NCERT
NEET - 2017
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A dioecious flowering plant prevents both:
1. Autogamy and geitonogamy
2. Geitonogamy and xenogamy
3. Cleistogamy and xenogamy
4. Autogamy and xenogamy
Subtopic: Pollination & Outbreeding Devices |
87%
From NCERT
NEET - 2017
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The morphological nature of the edible part of coconut is:
1. Cotyledon
2. Endosperm
3. Pericarp
4. Perisperm
Subtopic: Endosperm |
84%
From NCERT
NEET - 2017
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