Through which cell of the embryo sac, does the pollen tube enter the embryo sac:

1. Persistant synergid

2. Egg cell

3. Central cell

4. Degenerated synergid

Subtopic:  Pollen - Pistil Interaction |
 61%
AIPMT - 2005
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In a type of apomixis known as adventive embryony, embryos develop directly from the:

1. Synergids or antipodals in an embryo sac

2. Nucellus or integuments

3. Zygote

4. Accessory embryo sacs in the ovule

Subtopic:  Apomixis & Polyembryony |
 71%
AIPMT - 2005
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Which one of the following represents an ovule, where the embryo sac becomes horseshoe-shaped and the funiculus and micropyle are close to each other:

1. Amphitropous

2. Anatropous

3. Circinotropous

4. Atropous 

Subtopic:  Pistil: Ovule |
AIPMT - 2005

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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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An ovule that becomes curved so that the nucellus and embryo sac lies at right angles to the funicle is:

1. Campylotropous

2. Anatropous

3. Orthotropous

4. Hemitropous

Subtopic:  Pistil: Ovule |
AIPMT - 2004
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Ornithophilly takes place in:
1.  Yellow flower having nectaries
2.  Scented flower
3.  Flower with charming colour
4.  Modified corolla tube

Subtopic:  Pollination & Outbreeding Devices |
AIPMT - 1999

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Which pair is of insectivorous plants:
1.  Drosera and Vallisneria
2.  Utricularia and Hydrilla
3.  Allobandra and Utricularia
4.  Rafflesia and Dionea

Subtopic:  Pollination & Outbreeding Devices |
AIPMT - 1999

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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 |
 79%
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 |
 90%
From NCERT
AIPMT - 2000
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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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