Which one of the following pairs of plant strucutre has 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyEndosperm is consumed by developing embryo in the seed of
(1) coconut
(2) castor
(3) pea
(4) maize
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following is resistant to enzyme action?
(1) Cork
(2) Wood fibre
(3) Pollen exine
(4) Leaf cuticle
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMale gametes in angiosperms are formed by the division of:
(1) microspore
(2) generative cell
(3) vegetative cell
(4) microspore mother cell
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following is surrounded by a callose wall?
(1) Microspore mother cell
(2) Male gemete
(3) Egg
(4) Pollen grain
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyParthenocarpic 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.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLong filamentous threads protruding at the end of a young cob of maize are :
(1) anthers
(2) styles
(3) ovaries
(4) hairs
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology