What is the direction of the micropyle in the anatropous ovule:

1. Upward 2. Downward
3. Right 4. Left

Subtopic:  Pistil: Ovule |
 57%
From NCERT
AIPMT - 2002
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NEET 2023 - Target Batch - Aryan Raj Singh
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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 |
 59%
From NCERT
AIPMT - 2003
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Anemophilly type of pollination is found in:
1.  Salvia
2.  Bottlebrush
3.  Vallisneria
4.  Coconut

Subtopic:  Pollination & Outbreeding Devices |
From NCERT
AIPMT - 2001
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In grasses what happens in microspore mother cell for the formation of mature pollen grains:
1.  One meiotic and two mitotic divisions
2.  One meiotic & one mitotic division
3.  One meiotic division
4.  One mitotic division

Subtopic:  Stamen: Microsporangium |
 56%
From NCERT
AIPMT - 2001
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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 |
 81%
From NCERT
AIPMT - 2002
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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 |
 54%
From NCERT
AIPMT - 2000
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Endosperm is formed during double fertilization by:

1. Two polar nuclei & one male gamete

2. One polar nucleus & one male gamete

3. Ovum and male gamete

4. Two polar nuclei & two male gametes

Subtopic:  Double Fertilization |
 89%
From NCERT
AIPMT - 2000
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Eight-nucleated embryosac is:

1. Only monosporic

2. Only bisporic

3. Only tetra sporic

4. Any of the above

Subtopic:  Pistil: Female Gametophyte |
 78%
From NCERT
AIPMT - 2000
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Anthesis is a phenomenon that refers to:

1. formation of pollen

2. Development of anther

3. Opening of a flower bud

4. Reception of pollen by stigma

Subtopic:  Pollen - Pistil Interaction |
From NCERT
AIPMT - 2004
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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 |
 86%
From NCERT
NEET - 2021
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