Long 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 & BiologyIn angiosperms, microsporogenesis and megasporogenesis
(1) occur in anther
(2) form gametes without further divisions
(3) involve meiosis
(4) occur in ovule
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCoconut water from a tender coconut is
1. Immature embryo
2. Free nuclear endosperm
3. Innermost layers of the seed coat
4. degenerated nucellus
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of of the following fruits is parthenocarpic?
1. Brinjal
2. Apple
3. Jackfruit
4. Banana
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMale 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following statements is not true?
1. Pollen grains are rich in nutrients and they are used in the form of tablets and syrups
2. Pollen grains of some plants cause severe allergies and bronchial afflictions in some
people
3. The flowers pollinated by flies and beetles secrete foul odour to attract them
4. Honey is made by bees by digesting pollen collected from flowers
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPerisperm differs from endosperm in
1. being a haploid tissue
2. having no reserve food
3. being a diploid tissue
4. its formation by fusion of secondary nucleus with several sperms
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify the different parts of a typical dicot embryo labeled as A, B and C and select the correct option.
A | B | C | |
(1) |
Plumule |
Cotyledons |
Radicle |
(2) |
Radicle |
Cotyledons |
Plumule |
(3) |
Cotyledons |
Plumule |
Radicle |
(4) |
Cotyledons |
Radicle |
Plumule |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPollen grains are shed at which stage?
(1) 2 celled
(2) 3 celled
(3) Usually at 2-celled, but sometimes 3-celled
(4) Single celled stage
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology