In some members of which of the following pairs of families, pollen grains retain their viability for months after release?

1. Poaceae; Solanaceae

2. Rosaceae; Leguminosae

3. Poaceae; Rosaceae

4. Poaceae; Leguminosae

Subtopic:  Stamen: Male Gametophyte |
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A typical angiosperm embryo sac at maturity is:

1. 7-nucleate and 7-celled

2. 8-nucleate and 8-celled

3. 8-nucleate and 7-celled

4. 7-nucleate and 8-celled

Subtopic:  Pistil: Female Gametophyte |
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The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which during pollination, brings genetically different types of pollen grains to stigma, is:

1. Chasmogamy 2. Cleistogamy
3. Xenogamy 4. Geitonogamy

Subtopic:  Pollination & Outbreeding Devices |
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In grasses what happens in micro spore mother cell for the formation of mature pollen grains : -
1.  One meiotic and two mitotic divisions
2.  One meiotic & one mitotic divisions
3.  One meiotic division
4.  One mitotic division

Subtopic:  Stamen: Microsporangium |
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Anemophilly type of pollination is found in
1.  Salvia
2.  Bottle brush
3.  Vallisneria
4.  Coconut

Subtopic:  Pollination & Outbreeding Devices |
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In a flowering plant, archesporium gives rise to : -

(1 ) Only the wall of the sporangium

(2) Both wall and the sporogenous cells

(3) Wall and the tapetum

(4) Only tapetum and sporogenous cells

Subtopic:  Stamen: Microsporangium |

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What is the direction of micropyle in anatropous ovule :-

1. Upward

2. Downward

3. Right

4. Left

Subtopic:  Pistil: Ovule |
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In Angiosperms, pollen tubes liberate their male gametes into the

1. Central cell

2. Antipodal cells

3. Egg cell

4. Synergids

Subtopic:  Pollen - Pistil Interaction |
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Hair found in the inflorescences of Zea mays is the modification of:

1. Style 2. Stigma
3. Spathe 4. Filaments
Subtopic:  Pollination & Outbreeding Devices |
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Endosperm is formed during double fertilization by

1. Two polar nuclei & one male gamete

2. One polar nuclei & one male gamete

3. Ovum and male gamete

4. Two polar nuclei & two male gametes

Subtopic:  Double Fertilization |
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