262638
In angiosperms, triple fusion results in the formation of:
1 zygotic nucleus
2 polar nucleus
3 secondary nucleus
4 primary endosperm nucleus
Explanation:
In angiosperms, triple fusion take place between two polar nuclei and one sperm nucleus, which results in the formation of primary endosperm nucleus. This primary endosperm nucleus later evolves into an endosperm. It is used to provide nutrition to the developing embryo. It is present inside the seed of most flowering plant. This triple fusion occurs due to double fertilization in angiosperms.
WB JEE-2006
Sexual Reproduction in Flowering Plants
262640
Male gametophyte of angiosperms is reduced to
1 one cell
2 two cells
3 three cells
4 four cells
Explanation:
Male gametophyte of angiosperms is reduced to 3 - cells. They consist of one vegetative cells and one generative cell. This generative cells divides to form two mole gametes. So, angiospermic male gametophyte is 3 -celled. This vegetative cell give rise to tube nucleus which forms pollen tube.
Punjab MET-2009 / Haryana PMT-2009
Sexual Reproduction in Flowering Plants
262641
During the formation of embryo sac, the functional megaspore undergoes
1 two mitotic divisions
2 two meiotic divisions
3 three meiotic divisions
4 three mitotic divisions
Explanation:
During the formation of embryo sac, the functional megaspore undergoes three mitotic divisions and form 8- nucleate and 7- celled structure. The megaspore mother cell undergoes meiosis to give rise to 4 haploid cells. Three of them are degenerate and one survive to form embryo sac. This haploid cell undergoes mitosis to form 2 haploid nuclei. Two haploid nuclei further undergoes mitosis to form 4 haploid nuclei. After that these nuclei further undergoes mitosis to form 8 nucleate embryo sac.
Punjab MET-2009 / Rajasthan PMT-2009 UP CPMT-2009
Sexual Reproduction in Flowering Plants
262642
Embryo sac is also known as
1 microsporangium
2 micro gametophyte
3 megagametophyte
4 none of these
Explanation:
Embryo sac is also known as megagametophyte or female gametophyte. This is 8 nucleate 7 celled structure present inside the ovule of flowering plants. Microgametophyte is highly simplified and called pollen sacs. Mecrosporangium is produces microspore mother cells, which further undergoes divisions and produces microspores or pollen grains.
AIPMT-1994
Sexual Reproduction in Flowering Plants
262643
Which of the following is the result of double fertilization?
1 Cotyledon
2 Nucellus
3 Endosperm
4 None of these
Explanation:
In angiosperms, triple fusion take place between two polar nuclei and one sperm nucleus, which results in the formation of primary endosperm nucleus. This primary endosperm nucleus later evolves into an endosperm. It is used to provide nutrition to the developing embryo. It is present inside the seed of most flowering plant. This triple fusion occurs due to double fertilization in angiosperms and discovered by Nawaschin (1898).
262638
In angiosperms, triple fusion results in the formation of:
1 zygotic nucleus
2 polar nucleus
3 secondary nucleus
4 primary endosperm nucleus
Explanation:
In angiosperms, triple fusion take place between two polar nuclei and one sperm nucleus, which results in the formation of primary endosperm nucleus. This primary endosperm nucleus later evolves into an endosperm. It is used to provide nutrition to the developing embryo. It is present inside the seed of most flowering plant. This triple fusion occurs due to double fertilization in angiosperms.
WB JEE-2006
Sexual Reproduction in Flowering Plants
262640
Male gametophyte of angiosperms is reduced to
1 one cell
2 two cells
3 three cells
4 four cells
Explanation:
Male gametophyte of angiosperms is reduced to 3 - cells. They consist of one vegetative cells and one generative cell. This generative cells divides to form two mole gametes. So, angiospermic male gametophyte is 3 -celled. This vegetative cell give rise to tube nucleus which forms pollen tube.
Punjab MET-2009 / Haryana PMT-2009
Sexual Reproduction in Flowering Plants
262641
During the formation of embryo sac, the functional megaspore undergoes
1 two mitotic divisions
2 two meiotic divisions
3 three meiotic divisions
4 three mitotic divisions
Explanation:
During the formation of embryo sac, the functional megaspore undergoes three mitotic divisions and form 8- nucleate and 7- celled structure. The megaspore mother cell undergoes meiosis to give rise to 4 haploid cells. Three of them are degenerate and one survive to form embryo sac. This haploid cell undergoes mitosis to form 2 haploid nuclei. Two haploid nuclei further undergoes mitosis to form 4 haploid nuclei. After that these nuclei further undergoes mitosis to form 8 nucleate embryo sac.
Punjab MET-2009 / Rajasthan PMT-2009 UP CPMT-2009
Sexual Reproduction in Flowering Plants
262642
Embryo sac is also known as
1 microsporangium
2 micro gametophyte
3 megagametophyte
4 none of these
Explanation:
Embryo sac is also known as megagametophyte or female gametophyte. This is 8 nucleate 7 celled structure present inside the ovule of flowering plants. Microgametophyte is highly simplified and called pollen sacs. Mecrosporangium is produces microspore mother cells, which further undergoes divisions and produces microspores or pollen grains.
AIPMT-1994
Sexual Reproduction in Flowering Plants
262643
Which of the following is the result of double fertilization?
1 Cotyledon
2 Nucellus
3 Endosperm
4 None of these
Explanation:
In angiosperms, triple fusion take place between two polar nuclei and one sperm nucleus, which results in the formation of primary endosperm nucleus. This primary endosperm nucleus later evolves into an endosperm. It is used to provide nutrition to the developing embryo. It is present inside the seed of most flowering plant. This triple fusion occurs due to double fertilization in angiosperms and discovered by Nawaschin (1898).
262638
In angiosperms, triple fusion results in the formation of:
1 zygotic nucleus
2 polar nucleus
3 secondary nucleus
4 primary endosperm nucleus
Explanation:
In angiosperms, triple fusion take place between two polar nuclei and one sperm nucleus, which results in the formation of primary endosperm nucleus. This primary endosperm nucleus later evolves into an endosperm. It is used to provide nutrition to the developing embryo. It is present inside the seed of most flowering plant. This triple fusion occurs due to double fertilization in angiosperms.
WB JEE-2006
Sexual Reproduction in Flowering Plants
262640
Male gametophyte of angiosperms is reduced to
1 one cell
2 two cells
3 three cells
4 four cells
Explanation:
Male gametophyte of angiosperms is reduced to 3 - cells. They consist of one vegetative cells and one generative cell. This generative cells divides to form two mole gametes. So, angiospermic male gametophyte is 3 -celled. This vegetative cell give rise to tube nucleus which forms pollen tube.
Punjab MET-2009 / Haryana PMT-2009
Sexual Reproduction in Flowering Plants
262641
During the formation of embryo sac, the functional megaspore undergoes
1 two mitotic divisions
2 two meiotic divisions
3 three meiotic divisions
4 three mitotic divisions
Explanation:
During the formation of embryo sac, the functional megaspore undergoes three mitotic divisions and form 8- nucleate and 7- celled structure. The megaspore mother cell undergoes meiosis to give rise to 4 haploid cells. Three of them are degenerate and one survive to form embryo sac. This haploid cell undergoes mitosis to form 2 haploid nuclei. Two haploid nuclei further undergoes mitosis to form 4 haploid nuclei. After that these nuclei further undergoes mitosis to form 8 nucleate embryo sac.
Punjab MET-2009 / Rajasthan PMT-2009 UP CPMT-2009
Sexual Reproduction in Flowering Plants
262642
Embryo sac is also known as
1 microsporangium
2 micro gametophyte
3 megagametophyte
4 none of these
Explanation:
Embryo sac is also known as megagametophyte or female gametophyte. This is 8 nucleate 7 celled structure present inside the ovule of flowering plants. Microgametophyte is highly simplified and called pollen sacs. Mecrosporangium is produces microspore mother cells, which further undergoes divisions and produces microspores or pollen grains.
AIPMT-1994
Sexual Reproduction in Flowering Plants
262643
Which of the following is the result of double fertilization?
1 Cotyledon
2 Nucellus
3 Endosperm
4 None of these
Explanation:
In angiosperms, triple fusion take place between two polar nuclei and one sperm nucleus, which results in the formation of primary endosperm nucleus. This primary endosperm nucleus later evolves into an endosperm. It is used to provide nutrition to the developing embryo. It is present inside the seed of most flowering plant. This triple fusion occurs due to double fertilization in angiosperms and discovered by Nawaschin (1898).
262638
In angiosperms, triple fusion results in the formation of:
1 zygotic nucleus
2 polar nucleus
3 secondary nucleus
4 primary endosperm nucleus
Explanation:
In angiosperms, triple fusion take place between two polar nuclei and one sperm nucleus, which results in the formation of primary endosperm nucleus. This primary endosperm nucleus later evolves into an endosperm. It is used to provide nutrition to the developing embryo. It is present inside the seed of most flowering plant. This triple fusion occurs due to double fertilization in angiosperms.
WB JEE-2006
Sexual Reproduction in Flowering Plants
262640
Male gametophyte of angiosperms is reduced to
1 one cell
2 two cells
3 three cells
4 four cells
Explanation:
Male gametophyte of angiosperms is reduced to 3 - cells. They consist of one vegetative cells and one generative cell. This generative cells divides to form two mole gametes. So, angiospermic male gametophyte is 3 -celled. This vegetative cell give rise to tube nucleus which forms pollen tube.
Punjab MET-2009 / Haryana PMT-2009
Sexual Reproduction in Flowering Plants
262641
During the formation of embryo sac, the functional megaspore undergoes
1 two mitotic divisions
2 two meiotic divisions
3 three meiotic divisions
4 three mitotic divisions
Explanation:
During the formation of embryo sac, the functional megaspore undergoes three mitotic divisions and form 8- nucleate and 7- celled structure. The megaspore mother cell undergoes meiosis to give rise to 4 haploid cells. Three of them are degenerate and one survive to form embryo sac. This haploid cell undergoes mitosis to form 2 haploid nuclei. Two haploid nuclei further undergoes mitosis to form 4 haploid nuclei. After that these nuclei further undergoes mitosis to form 8 nucleate embryo sac.
Punjab MET-2009 / Rajasthan PMT-2009 UP CPMT-2009
Sexual Reproduction in Flowering Plants
262642
Embryo sac is also known as
1 microsporangium
2 micro gametophyte
3 megagametophyte
4 none of these
Explanation:
Embryo sac is also known as megagametophyte or female gametophyte. This is 8 nucleate 7 celled structure present inside the ovule of flowering plants. Microgametophyte is highly simplified and called pollen sacs. Mecrosporangium is produces microspore mother cells, which further undergoes divisions and produces microspores or pollen grains.
AIPMT-1994
Sexual Reproduction in Flowering Plants
262643
Which of the following is the result of double fertilization?
1 Cotyledon
2 Nucellus
3 Endosperm
4 None of these
Explanation:
In angiosperms, triple fusion take place between two polar nuclei and one sperm nucleus, which results in the formation of primary endosperm nucleus. This primary endosperm nucleus later evolves into an endosperm. It is used to provide nutrition to the developing embryo. It is present inside the seed of most flowering plant. This triple fusion occurs due to double fertilization in angiosperms and discovered by Nawaschin (1898).
262638
In angiosperms, triple fusion results in the formation of:
1 zygotic nucleus
2 polar nucleus
3 secondary nucleus
4 primary endosperm nucleus
Explanation:
In angiosperms, triple fusion take place between two polar nuclei and one sperm nucleus, which results in the formation of primary endosperm nucleus. This primary endosperm nucleus later evolves into an endosperm. It is used to provide nutrition to the developing embryo. It is present inside the seed of most flowering plant. This triple fusion occurs due to double fertilization in angiosperms.
WB JEE-2006
Sexual Reproduction in Flowering Plants
262640
Male gametophyte of angiosperms is reduced to
1 one cell
2 two cells
3 three cells
4 four cells
Explanation:
Male gametophyte of angiosperms is reduced to 3 - cells. They consist of one vegetative cells and one generative cell. This generative cells divides to form two mole gametes. So, angiospermic male gametophyte is 3 -celled. This vegetative cell give rise to tube nucleus which forms pollen tube.
Punjab MET-2009 / Haryana PMT-2009
Sexual Reproduction in Flowering Plants
262641
During the formation of embryo sac, the functional megaspore undergoes
1 two mitotic divisions
2 two meiotic divisions
3 three meiotic divisions
4 three mitotic divisions
Explanation:
During the formation of embryo sac, the functional megaspore undergoes three mitotic divisions and form 8- nucleate and 7- celled structure. The megaspore mother cell undergoes meiosis to give rise to 4 haploid cells. Three of them are degenerate and one survive to form embryo sac. This haploid cell undergoes mitosis to form 2 haploid nuclei. Two haploid nuclei further undergoes mitosis to form 4 haploid nuclei. After that these nuclei further undergoes mitosis to form 8 nucleate embryo sac.
Punjab MET-2009 / Rajasthan PMT-2009 UP CPMT-2009
Sexual Reproduction in Flowering Plants
262642
Embryo sac is also known as
1 microsporangium
2 micro gametophyte
3 megagametophyte
4 none of these
Explanation:
Embryo sac is also known as megagametophyte or female gametophyte. This is 8 nucleate 7 celled structure present inside the ovule of flowering plants. Microgametophyte is highly simplified and called pollen sacs. Mecrosporangium is produces microspore mother cells, which further undergoes divisions and produces microspores or pollen grains.
AIPMT-1994
Sexual Reproduction in Flowering Plants
262643
Which of the following is the result of double fertilization?
1 Cotyledon
2 Nucellus
3 Endosperm
4 None of these
Explanation:
In angiosperms, triple fusion take place between two polar nuclei and one sperm nucleus, which results in the formation of primary endosperm nucleus. This primary endosperm nucleus later evolves into an endosperm. It is used to provide nutrition to the developing embryo. It is present inside the seed of most flowering plant. This triple fusion occurs due to double fertilization in angiosperms and discovered by Nawaschin (1898).
