What does the filiform apparatus do at the entrance into ovule?

(1) It helps in the entry of pollen tube into a synergid

(2) It prevents entry of more than one pollen tube into the embryo sac

(3) It brings about opening of the pollen tube

(4) It guides pollen tube from a synergid to egg

Subtopic:  Pistil: Female Gametophyte |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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NEET 2021 - Achiever Batch - Aryan Raj Singh

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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 |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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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:  Stamen: Male Gametophyte |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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Which one of the following is surrounded by a callose wall?

(1) Microspore mother cell

(2) Male gemete

(3) Egg

(4) Pollen grain

Subtopic:  Stamen: Microsporangium |
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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 it synergids ?

(1) 16

(2) 24

(3) 32

(4) 8

Subtopic:  Double Fertilization |
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Parthenocarpic tomato fruits can be produced by :

(1) removing androecium of flowers before pollen grains are released

(2) treating the plants with low concentrations of gibberellic acid and auxins

(3) raising the plants from vernalized seeds

(4) treating the plants with phenylmercuric acetate.

Subtopic:  Fruit |
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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 |
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The arrangement of the nuclei in a normal embryo sac in the dicot plant is :

(1) 2+4+2

(2) 3+2+3

(3) 2+3+3

(4) 3+3+2

Subtopic:  Pistil: Female Gametophyte |
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In angiosperms, microsporogenesis and megasporogenesis

(1) occur in anther

(2) form gametes without further divisions

(3) involve meiosis

(4) occur in ovule

Subtopic:  Stamen: Microsporangium | Pistil: Female Gametophyte |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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Coconut water from a tender coconut is

1. Immature embryo

2. Free nuclear endosperm

3. Innermost layers of the seed coat

4. degenerated nucellus

Subtopic:  Endosperm |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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