Post-Fertilisation: Structure and Events
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BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341889 Starting from the innermost part, the correct sequence of parts in an ovule are,

1 egg, nucellus, embryo sac, integument
2 egg, embryo sac, nucellus, integument
3 embryo sac, nucellus, integument, egg
4 egg, integument, embryo sac, nucellus.
NCERT Exemplar
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341890 The number of cells in the polygonum type of embryo sac that degenerates after fertilization

1 4
2 5
3 6
4 3
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341892 With respect to following diagram identify?
i. Structure that serves as landing platform pollen
ii. Contains ovules
iii. Serves as a channel for growth of pollen tube
supporting img

1 i - C, ii - B, iii - A
2 i - A, ii - C, iii - B
3 i - A, ii - B, iii - C
4 i - C, ii - A, iii - B
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341893 Assertion :
Megaspore mother cell undergoes meiosis to produce four megaspores
Reason :
Megaspore mother cell and megaspore both are haploid

1 Both Assertion and Reason are true and Reason is correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
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BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341889 Starting from the innermost part, the correct sequence of parts in an ovule are,

1 egg, nucellus, embryo sac, integument
2 egg, embryo sac, nucellus, integument
3 embryo sac, nucellus, integument, egg
4 egg, integument, embryo sac, nucellus.
NCERT Exemplar
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341890 The number of cells in the polygonum type of embryo sac that degenerates after fertilization

1 4
2 5
3 6
4 3
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341892 With respect to following diagram identify?
i. Structure that serves as landing platform pollen
ii. Contains ovules
iii. Serves as a channel for growth of pollen tube
supporting img

1 i - C, ii - B, iii - A
2 i - A, ii - C, iii - B
3 i - A, ii - B, iii - C
4 i - C, ii - A, iii - B
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341893 Assertion :
Megaspore mother cell undergoes meiosis to produce four megaspores
Reason :
Megaspore mother cell and megaspore both are haploid

1 Both Assertion and Reason are true and Reason is correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
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BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341889 Starting from the innermost part, the correct sequence of parts in an ovule are,

1 egg, nucellus, embryo sac, integument
2 egg, embryo sac, nucellus, integument
3 embryo sac, nucellus, integument, egg
4 egg, integument, embryo sac, nucellus.
NCERT Exemplar
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341890 The number of cells in the polygonum type of embryo sac that degenerates after fertilization

1 4
2 5
3 6
4 3
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341892 With respect to following diagram identify?
i. Structure that serves as landing platform pollen
ii. Contains ovules
iii. Serves as a channel for growth of pollen tube
supporting img

1 i - C, ii - B, iii - A
2 i - A, ii - C, iii - B
3 i - A, ii - B, iii - C
4 i - C, ii - A, iii - B
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341893 Assertion :
Megaspore mother cell undergoes meiosis to produce four megaspores
Reason :
Megaspore mother cell and megaspore both are haploid

1 Both Assertion and Reason are true and Reason is correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
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BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341889 Starting from the innermost part, the correct sequence of parts in an ovule are,

1 egg, nucellus, embryo sac, integument
2 egg, embryo sac, nucellus, integument
3 embryo sac, nucellus, integument, egg
4 egg, integument, embryo sac, nucellus.
NCERT Exemplar
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341890 The number of cells in the polygonum type of embryo sac that degenerates after fertilization

1 4
2 5
3 6
4 3
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341892 With respect to following diagram identify?
i. Structure that serves as landing platform pollen
ii. Contains ovules
iii. Serves as a channel for growth of pollen tube
supporting img

1 i - C, ii - B, iii - A
2 i - A, ii - C, iii - B
3 i - A, ii - B, iii - C
4 i - C, ii - A, iii - B
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS

341893 Assertion :
Megaspore mother cell undergoes meiosis to produce four megaspores
Reason :
Megaspore mother cell and megaspore both are haploid

1 Both Assertion and Reason are true and Reason is correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
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