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Q. No.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
| 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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Seed formation without fertilization in flowering plants involves the process of?
1. budding
2. somatic hybridization
3. apomixis
4. sporulation
2. somatic hybridization
3. apomixis
4. sporulation
Subtopic: Apomixis & Polyembryony |
96%
From NCERT
NEET - 2016
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Filiform apparatus is a characteristic feature of?
1. Generative cell
2. nucellar embryo
3. aleurone cell
4. synergids
Subtopic: Pistil: Female Gametophyte |
91%
From NCERT
NEET - 2015
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In angiosperms, microsporogenesis and megasporogenesis?
1. Occur in anther
2. Form gametes without further divisions
3. Involve meiosis
4. Occur in ovule
Subtopic: Stamen: Male Gametophyte | Pistil: Female Gametophyte |
84%
From NCERT
NEET - 2015
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Coconut water from a tender coconut is?
1. Immature embryo
2. Free nuclear endosperm
3. Innermost layers of the seed coat
4. Degenerated nucellus
Subtopic: Endosperm |
96%
From NCERT
NEET - 2015
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Subtopic: Fruit |
88%
From NCERT
NEET - 2015
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Male gametophyte in angiosperms produces?
1. Two sperms and a vegetative cell
2. Single sperm and a vegetative cell
3. Single sperm and two vegetative cells
4. Three sperms
Subtopic: Stamen: Male Gametophyte |
78%
From NCERT
NEET - 2015
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