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Q. No.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
| 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 |
78%
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
Subtopic: Pistil: Ovule |
71%
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 |
86%
From NCERT
NEET - 2017
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Which one of the following statements is not true?
| 1. | Exine of pollen grains is made up of sporopollenin |
| 2. | Pollen grains of many species cause severe allergies |
| 3. | Stored pollen in liquid nitrogen can be used in crop breeding programs |
| 4. | Tapetum helps in the dehiscence of anther |
Subtopic: Stamen: Anther |
90%
From NCERT
NEET - 2016
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Proximal end of the filament of stamen is attached to the?
| 1. | connective | 2. | placenta |
| 3. | thalamus or petal | 4. | anther |
Subtopic: Stamen: Anther |
88%
From NCERT
NEET - 2016
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The coconut water from tender coconut represents?
1. fleshy mesocarp
2. free - nuclear proembryo
3. free - nuclear endosperm
4. endocarp
2. free - nuclear proembryo
3. free - nuclear endosperm
4. endocarp
Subtopic: Endosperm |
93%
From NCERT
NEET - 2016
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Which of the following statements is not correct?
| 1. | Insects that consume pollen or nectar without bringing about pollination are called pollen-nectar robbers |
| 2. | Pollen germination and pollen tube growth are regulated by chemical compounds of pollen interacting with those of the pistil |
| 3. | Some reptiles have also been reported as pollinators in some plant species |
| 4. | Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style. |
Subtopic: Pollen - Pistil Interaction |
73%
From NCERT
NEET - 2016
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