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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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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Subtopic: Double Fertilization |
92%
From NCERT
NEET - 2017
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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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Transmission tissue is a characteristic feature of:
1. hollow style
2. solid style
3. dry stigma
4. wet stigma
2. solid style
3. dry stigma
4. wet stigma
Subtopic: Pistil: Ovule |
NEET - 2015
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Male gametophyte with least number of cells is present in:
1. Pteris
2. Funaria
3. Lilium
4. Pinus
Subtopic: Stamen: Male Gametophyte |
AIPMT - 2014
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Perisperm differs from endosperm in:
| 1. | having no reserve food |
| 2. | being a diploid tissue |
| 3. | its formation by fusion of secondary nucleus with several sperms |
| 4. | being a haploid tissue |
Subtopic: Seed |
66%
AIPMT - 2013
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