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.
Explanation:
Egg, embryo sac, nucellus, integument, this is the correct sequence from inside to outside.
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
Explanation:
Two synergids and three antipodals, i.e., five cells degenerate after fertilization.
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
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
Explanation:
i - A, ii - C, 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.
Explanation:
Megaspore mother cell is diploid and megaspores are haploid.
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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.
Explanation:
Egg, embryo sac, nucellus, integument, this is the correct sequence from inside to outside.
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
Explanation:
Two synergids and three antipodals, i.e., five cells degenerate after fertilization.
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
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
Explanation:
i - A, ii - C, 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.
Explanation:
Megaspore mother cell is diploid and megaspores are haploid.
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.
Explanation:
Egg, embryo sac, nucellus, integument, this is the correct sequence from inside to outside.
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
Explanation:
Two synergids and three antipodals, i.e., five cells degenerate after fertilization.
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
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
Explanation:
i - A, ii - C, 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.
Explanation:
Megaspore mother cell is diploid and megaspores are haploid.
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.
Explanation:
Egg, embryo sac, nucellus, integument, this is the correct sequence from inside to outside.
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
Explanation:
Two synergids and three antipodals, i.e., five cells degenerate after fertilization.
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
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
Explanation:
i - A, ii - C, 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.
Explanation:
Megaspore mother cell is diploid and megaspores are haploid.
