Which of the following has proved helpful in preserving pollens as fossils?
1. | Pollen kit | 2. | Cellulosic intine |
3. | Oil content | 4. | Sporopollenin |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWinged pollen grains are present in:
1 Mustard
2. Cycas
3. Mango
4. Pinus
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPollen 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDioecy in plants prevents:
(1) Autogamy but not geitonogamy
(2) Geitonogamy but not autogamy
(3) Both autogamy and geitonogamy
(4) Neither autogamy nor geitonogamy
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFunctional megaspore in an angiosperm develops into
(1) ovule
(2) endosperm
(3) embryo sac
(4) embryo
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe morphological nature of the edible part of coconut is
(1) perisperm
(2) cotyledon
(3) endosperm
(4) pericarp
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFunctional megaspore in an angiosperm develops into:
1. | Endosperm | 2. | Embryo sac |
3. | Embryo | 4. | Ovule |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAttractants and rewards are required for:
1. Entomophily
2. Hydrophily
3. Cleistogamy
4. Anemophily
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology