Apomictic embryos in Citrus arise from

(1) synergids

(2) maternal sporophytic tissue in ovule

(3) antipodal cells

(4) diploid egg

Subtopic:  Apomixis & Polyembryony |
 67%
From NCERT
NEET - 2010
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Wind pollinated flowers are

1. small, brightly coloured, producing large number of pollen grains
2. small, producing large number of dry pollen grains
3. large, producing abundant nectar and pollen
4. small, producing nectar and dry pollen
Subtopic:  Pollination & Outbreeding Devices |
 77%
From NCERT
NEET - 2010
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Endosperm is consumed by developing embryo in the seed of

(1) coconut

(2) castor

(3) pea

(4) maize

Subtopic:  Seed |
 73%
From NCERT
NEET - 2008
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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 |
 52%
From NCERT
NEET - 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

Subtopic:  Stamen: Male Gametophyte |
 95%
From NCERT
NEET - 2008
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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 |
 61%
From NCERT
NEET - 2007
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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 |
 69%
From NCERT
NEET - 2006
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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 |
 84%
From NCERT
NEET - 2015
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Which of of the following fruits is parthenocarpic?

1. Brinjal

2. Apple

3. Jackfruit

4. Banana

Subtopic:  Fruit |
 87%
From NCERT
NEET - 2015
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Male gametophyte in angiosperms produces 

1. two sperms and a vegetative cell

2. single sperm and a vegetative cell

3. single sperm and two vegetative cells

4. three sperms

Subtopic:  Stamen: Male Gametophyte |
 80%
From NCERT
NEET - 2015
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