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Q. No.Which one of the following pairs of plant structures has a haploid number of chromosomes?
1. Megaspore mother cell and antipodal cells
2. Egg cell and antipodal cells
3. Nucellus and antipodal cells
4. Egg nucleus and secondary nucleus
Subtopic: Pistil: Female Gametophyte |
71%
Level 2: 60%+
AIPMT - 2008
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Subtopic: Endosperm |
71%
Level 2: 60%+
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%
Level 3: 35%-60%
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 |
56%
Level 3: 35%-60%
AIPMT - 2008
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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
1. Cork
2. Wood fibre
3. Pollen exine
4. Leaf cuticle
Subtopic: Stamen: Male Gametophyte |
95%
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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 |
61%
Level 2: 60%+
AIPMT - 2007
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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 |
52%
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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 |
55%
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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 |
67%
Level 2: 60%+
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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 |
81%
Level 1: 80%+
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