In a cereal grain, the single cotyledon of the embryo is represented by:

1. coleorhiza

2. scutellum

3. prophyll

4. coleoptiles

Subtopic:  Embryo |
 88%
From NCERT
AIPMT - 2006
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The arrangement of the nuclei in a normal embryo sac in the dicot plants is:

1. 2+4+2

2. 3+2+3

3. 2+3+3

4. 3+3+2

Subtopic:  Embryo |
 83%
AIPMT - 2006
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Long filamentous threads protruding at the end of a young cob of maize are:

1. anthers 2. styles
3. ovaries 4. hairs

Subtopic:  Pollination & Outbreeding Devices |
 70%
AIPMT - 2006
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What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?

1. 16

2. 24

3. 32

4. 8

Subtopic:  Pistil: Female Gametophyte |
 58%
AIPMT - 2006
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Which one of the following is surrounded by a callose wall?

1. Microspore mother cell

2. Male gamete

3. Egg

4. Pollen grain

Subtopic:  Pistil: Female Gametophyte |
 53%
AIPMT - 2007
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Male gametes in angiosperms are formed by the division of:

1. microspore

2. generative cell

3. vegetative cell

4. microspore mother cell

Subtopic:  Pistil: Ovule |
 60%
AIPMT - 2007
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Which one of the following is resistant to enzyme action?

1. Cork
2. Wood fibre
3. Pollen exine
4. Leaf cuticle
Subtopic:  Stamen: Male Gametophyte |
 94%
From NCERT
AIPMT - 2008
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What does the filiform apparatus do at the entrance into the ovule?
1. it helps in the entry of pollen tube into the synergid
2. it prevents the entry of more than one pollen tube into the embryo sac
3. it brings about the opening of the pollen tube
4. it guides the pollen tube from the synergid to the egg

Subtopic:  Pistil: Female Gametophyte |
 54%
From NCERT
AIPMT - 2008
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Unisexuality of flowers prevents:

1. autogamy, but not geitonogamy

2. Both geitonogamy and xenogamy

3. geitonogamy, but not xenogamy

4. autogamy and geitonogamy

Subtopic:  Pollination & Outbreeding Devices |
 59%
From NCERT
AIPMT - 2008
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Endosperm is consumed by developing embryo in the seed of:

1. coconut

2. castor

3. pea

4. maize
Subtopic:  Endosperm |
 71%
AIPMT - 2008
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