1 It supplies a haploid set of chromosomes to the future embryo
2 It provides most of the cytoplasm to the embryo
3 It supplies food reserve to the embryo
4 All of the above
Explanation:
All sexually reproducing organisms have sex cells called gametes. The gamete, produced by the female is called the egg or ovum (plural \(=\) ova). It joins with the sperm, the male gamete, during fertilization to form the embryo, which will eventually grow into a new organism.
BIOXII01: REPRODUCTION IN ORGANISMS
341483
A diploid parent plant body produces _____ gametes, and a haploid parent plant body produces _____ gametes
1 Diploid, haploid
2 Haploid, diploid
3 Diploid, diploid
4 Haploid, haploid
Explanation:
Gametes are always haploid.
BIOXII01: REPRODUCTION IN ORGANISMS
341484
The number of chromosomes in the shoot tip cells of a maize plant is 20 . The number of chromosomes in the microspore mother cells of the same plant shall be:
1 20
2 1
3 40
4 15
Explanation:
Microspore mother cell has same ploidy as the vegetative parts.
NCERT Exemplar
BIOXII01: REPRODUCTION IN ORGANISMS
341485
Assertion : There is no need of a medium through which the male gametes move. Reason : In few fungi and algae both, female gametes are never motile.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
There is a need for a medium through which the male gametes move.In few fungi and algae both, male and female gametes both are motile.
BIOXII01: REPRODUCTION IN ORGANISMS
341486
Fertilization by pollen tubes is called _______ and _______ it is seen in
1 Apogamy, algae
2 Siphonogamy, Angiosperms
3 Apogamy, bryophyta
4 Siphonogamy, bryophyta
Explanation:
Siphonogamy is a condition in plants in which pollen tubes are developed for the transfer of the male cells to the eggs. It is seen in Angiosperms.
1 It supplies a haploid set of chromosomes to the future embryo
2 It provides most of the cytoplasm to the embryo
3 It supplies food reserve to the embryo
4 All of the above
Explanation:
All sexually reproducing organisms have sex cells called gametes. The gamete, produced by the female is called the egg or ovum (plural \(=\) ova). It joins with the sperm, the male gamete, during fertilization to form the embryo, which will eventually grow into a new organism.
BIOXII01: REPRODUCTION IN ORGANISMS
341483
A diploid parent plant body produces _____ gametes, and a haploid parent plant body produces _____ gametes
1 Diploid, haploid
2 Haploid, diploid
3 Diploid, diploid
4 Haploid, haploid
Explanation:
Gametes are always haploid.
BIOXII01: REPRODUCTION IN ORGANISMS
341484
The number of chromosomes in the shoot tip cells of a maize plant is 20 . The number of chromosomes in the microspore mother cells of the same plant shall be:
1 20
2 1
3 40
4 15
Explanation:
Microspore mother cell has same ploidy as the vegetative parts.
NCERT Exemplar
BIOXII01: REPRODUCTION IN ORGANISMS
341485
Assertion : There is no need of a medium through which the male gametes move. Reason : In few fungi and algae both, female gametes are never motile.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
There is a need for a medium through which the male gametes move.In few fungi and algae both, male and female gametes both are motile.
BIOXII01: REPRODUCTION IN ORGANISMS
341486
Fertilization by pollen tubes is called _______ and _______ it is seen in
1 Apogamy, algae
2 Siphonogamy, Angiosperms
3 Apogamy, bryophyta
4 Siphonogamy, bryophyta
Explanation:
Siphonogamy is a condition in plants in which pollen tubes are developed for the transfer of the male cells to the eggs. It is seen in Angiosperms.
1 It supplies a haploid set of chromosomes to the future embryo
2 It provides most of the cytoplasm to the embryo
3 It supplies food reserve to the embryo
4 All of the above
Explanation:
All sexually reproducing organisms have sex cells called gametes. The gamete, produced by the female is called the egg or ovum (plural \(=\) ova). It joins with the sperm, the male gamete, during fertilization to form the embryo, which will eventually grow into a new organism.
BIOXII01: REPRODUCTION IN ORGANISMS
341483
A diploid parent plant body produces _____ gametes, and a haploid parent plant body produces _____ gametes
1 Diploid, haploid
2 Haploid, diploid
3 Diploid, diploid
4 Haploid, haploid
Explanation:
Gametes are always haploid.
BIOXII01: REPRODUCTION IN ORGANISMS
341484
The number of chromosomes in the shoot tip cells of a maize plant is 20 . The number of chromosomes in the microspore mother cells of the same plant shall be:
1 20
2 1
3 40
4 15
Explanation:
Microspore mother cell has same ploidy as the vegetative parts.
NCERT Exemplar
BIOXII01: REPRODUCTION IN ORGANISMS
341485
Assertion : There is no need of a medium through which the male gametes move. Reason : In few fungi and algae both, female gametes are never motile.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
There is a need for a medium through which the male gametes move.In few fungi and algae both, male and female gametes both are motile.
BIOXII01: REPRODUCTION IN ORGANISMS
341486
Fertilization by pollen tubes is called _______ and _______ it is seen in
1 Apogamy, algae
2 Siphonogamy, Angiosperms
3 Apogamy, bryophyta
4 Siphonogamy, bryophyta
Explanation:
Siphonogamy is a condition in plants in which pollen tubes are developed for the transfer of the male cells to the eggs. It is seen in Angiosperms.
1 It supplies a haploid set of chromosomes to the future embryo
2 It provides most of the cytoplasm to the embryo
3 It supplies food reserve to the embryo
4 All of the above
Explanation:
All sexually reproducing organisms have sex cells called gametes. The gamete, produced by the female is called the egg or ovum (plural \(=\) ova). It joins with the sperm, the male gamete, during fertilization to form the embryo, which will eventually grow into a new organism.
BIOXII01: REPRODUCTION IN ORGANISMS
341483
A diploid parent plant body produces _____ gametes, and a haploid parent plant body produces _____ gametes
1 Diploid, haploid
2 Haploid, diploid
3 Diploid, diploid
4 Haploid, haploid
Explanation:
Gametes are always haploid.
BIOXII01: REPRODUCTION IN ORGANISMS
341484
The number of chromosomes in the shoot tip cells of a maize plant is 20 . The number of chromosomes in the microspore mother cells of the same plant shall be:
1 20
2 1
3 40
4 15
Explanation:
Microspore mother cell has same ploidy as the vegetative parts.
NCERT Exemplar
BIOXII01: REPRODUCTION IN ORGANISMS
341485
Assertion : There is no need of a medium through which the male gametes move. Reason : In few fungi and algae both, female gametes are never motile.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
There is a need for a medium through which the male gametes move.In few fungi and algae both, male and female gametes both are motile.
BIOXII01: REPRODUCTION IN ORGANISMS
341486
Fertilization by pollen tubes is called _______ and _______ it is seen in
1 Apogamy, algae
2 Siphonogamy, Angiosperms
3 Apogamy, bryophyta
4 Siphonogamy, bryophyta
Explanation:
Siphonogamy is a condition in plants in which pollen tubes are developed for the transfer of the male cells to the eggs. It is seen in Angiosperms.
1 It supplies a haploid set of chromosomes to the future embryo
2 It provides most of the cytoplasm to the embryo
3 It supplies food reserve to the embryo
4 All of the above
Explanation:
All sexually reproducing organisms have sex cells called gametes. The gamete, produced by the female is called the egg or ovum (plural \(=\) ova). It joins with the sperm, the male gamete, during fertilization to form the embryo, which will eventually grow into a new organism.
BIOXII01: REPRODUCTION IN ORGANISMS
341483
A diploid parent plant body produces _____ gametes, and a haploid parent plant body produces _____ gametes
1 Diploid, haploid
2 Haploid, diploid
3 Diploid, diploid
4 Haploid, haploid
Explanation:
Gametes are always haploid.
BIOXII01: REPRODUCTION IN ORGANISMS
341484
The number of chromosomes in the shoot tip cells of a maize plant is 20 . The number of chromosomes in the microspore mother cells of the same plant shall be:
1 20
2 1
3 40
4 15
Explanation:
Microspore mother cell has same ploidy as the vegetative parts.
NCERT Exemplar
BIOXII01: REPRODUCTION IN ORGANISMS
341485
Assertion : There is no need of a medium through which the male gametes move. Reason : In few fungi and algae both, female gametes are never motile.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
There is a need for a medium through which the male gametes move.In few fungi and algae both, male and female gametes both are motile.
BIOXII01: REPRODUCTION IN ORGANISMS
341486
Fertilization by pollen tubes is called _______ and _______ it is seen in
1 Apogamy, algae
2 Siphonogamy, Angiosperms
3 Apogamy, bryophyta
4 Siphonogamy, bryophyta
Explanation:
Siphonogamy is a condition in plants in which pollen tubes are developed for the transfer of the male cells to the eggs. It is seen in Angiosperms.
