Apogany is failure of fusion of gametes, which results in the development of sporophyte directly from the gametophyte. It was first reported by Farlow (1878). It produces a diploid gametophyte.
Uttarakhand PMT-2004
Sexual Reproduction in Flowering Plants
262657
The fertilized secondary nucleus of the ovule, during double fertilization, establishes the
1 seed coat
2 embryo plant
3 endosperm
4 pericarp
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 evolved 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.
JIPMER-1999
Sexual Reproduction in Flowering Plants
262658
The nucleus of megaspore divides mitotically to form two nuclei which move to opposite poles, and thus form an embryo sac which is
1 8 nucleate
2 6 nucleate
3 4 nucleate
4 2 nucleate
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 functional 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.
In a flowering plant, megaspore develops into an embryo sac. Which contain 7 cells and 8 nuclei. 3 cells ( 2 synergid +1 egg cell) are form egg apparatus mid of which called egg cell and present at micropylar end. On cell present at middle of the embryo sac called secondary nuclei. Which contain two nuclei. And rest 3 cells are form antipodal cell and present at chalazal end.
J and K CET-2014
Sexual Reproduction in Flowering Plants
262660
The ovule of angiosperm is technically known as
1 Megaspore mother cell
2 Megasporangium
3 Megaspore
4 Megasporophyll
Explanation:
The ovule of angiosperm is technically known as megasporangium, Megasporangium is equivalent to the ovule. ovule is also called megasporangium and is protected by one or two covering called integuments. A mature ovule consists of a stalk and a body. The stalk or the funiculus (also called funicle) is present at the base and it attaches the ovule to the placenta.
Apogany is failure of fusion of gametes, which results in the development of sporophyte directly from the gametophyte. It was first reported by Farlow (1878). It produces a diploid gametophyte.
Uttarakhand PMT-2004
Sexual Reproduction in Flowering Plants
262657
The fertilized secondary nucleus of the ovule, during double fertilization, establishes the
1 seed coat
2 embryo plant
3 endosperm
4 pericarp
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 evolved 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.
JIPMER-1999
Sexual Reproduction in Flowering Plants
262658
The nucleus of megaspore divides mitotically to form two nuclei which move to opposite poles, and thus form an embryo sac which is
1 8 nucleate
2 6 nucleate
3 4 nucleate
4 2 nucleate
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 functional 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.
In a flowering plant, megaspore develops into an embryo sac. Which contain 7 cells and 8 nuclei. 3 cells ( 2 synergid +1 egg cell) are form egg apparatus mid of which called egg cell and present at micropylar end. On cell present at middle of the embryo sac called secondary nuclei. Which contain two nuclei. And rest 3 cells are form antipodal cell and present at chalazal end.
J and K CET-2014
Sexual Reproduction in Flowering Plants
262660
The ovule of angiosperm is technically known as
1 Megaspore mother cell
2 Megasporangium
3 Megaspore
4 Megasporophyll
Explanation:
The ovule of angiosperm is technically known as megasporangium, Megasporangium is equivalent to the ovule. ovule is also called megasporangium and is protected by one or two covering called integuments. A mature ovule consists of a stalk and a body. The stalk or the funiculus (also called funicle) is present at the base and it attaches the ovule to the placenta.
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Sexual Reproduction in Flowering Plants
262656
Apogamy is :
1 Reproduction of virus
2 Failure of fusion of gametes
3 Development of bacteria
4 Loss of function of reproduction
Explanation:
Apogany is failure of fusion of gametes, which results in the development of sporophyte directly from the gametophyte. It was first reported by Farlow (1878). It produces a diploid gametophyte.
Uttarakhand PMT-2004
Sexual Reproduction in Flowering Plants
262657
The fertilized secondary nucleus of the ovule, during double fertilization, establishes the
1 seed coat
2 embryo plant
3 endosperm
4 pericarp
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 evolved 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.
JIPMER-1999
Sexual Reproduction in Flowering Plants
262658
The nucleus of megaspore divides mitotically to form two nuclei which move to opposite poles, and thus form an embryo sac which is
1 8 nucleate
2 6 nucleate
3 4 nucleate
4 2 nucleate
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 functional 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.
In a flowering plant, megaspore develops into an embryo sac. Which contain 7 cells and 8 nuclei. 3 cells ( 2 synergid +1 egg cell) are form egg apparatus mid of which called egg cell and present at micropylar end. On cell present at middle of the embryo sac called secondary nuclei. Which contain two nuclei. And rest 3 cells are form antipodal cell and present at chalazal end.
J and K CET-2014
Sexual Reproduction in Flowering Plants
262660
The ovule of angiosperm is technically known as
1 Megaspore mother cell
2 Megasporangium
3 Megaspore
4 Megasporophyll
Explanation:
The ovule of angiosperm is technically known as megasporangium, Megasporangium is equivalent to the ovule. ovule is also called megasporangium and is protected by one or two covering called integuments. A mature ovule consists of a stalk and a body. The stalk or the funiculus (also called funicle) is present at the base and it attaches the ovule to the placenta.
Apogany is failure of fusion of gametes, which results in the development of sporophyte directly from the gametophyte. It was first reported by Farlow (1878). It produces a diploid gametophyte.
Uttarakhand PMT-2004
Sexual Reproduction in Flowering Plants
262657
The fertilized secondary nucleus of the ovule, during double fertilization, establishes the
1 seed coat
2 embryo plant
3 endosperm
4 pericarp
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 evolved 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.
JIPMER-1999
Sexual Reproduction in Flowering Plants
262658
The nucleus of megaspore divides mitotically to form two nuclei which move to opposite poles, and thus form an embryo sac which is
1 8 nucleate
2 6 nucleate
3 4 nucleate
4 2 nucleate
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 functional 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.
In a flowering plant, megaspore develops into an embryo sac. Which contain 7 cells and 8 nuclei. 3 cells ( 2 synergid +1 egg cell) are form egg apparatus mid of which called egg cell and present at micropylar end. On cell present at middle of the embryo sac called secondary nuclei. Which contain two nuclei. And rest 3 cells are form antipodal cell and present at chalazal end.
J and K CET-2014
Sexual Reproduction in Flowering Plants
262660
The ovule of angiosperm is technically known as
1 Megaspore mother cell
2 Megasporangium
3 Megaspore
4 Megasporophyll
Explanation:
The ovule of angiosperm is technically known as megasporangium, Megasporangium is equivalent to the ovule. ovule is also called megasporangium and is protected by one or two covering called integuments. A mature ovule consists of a stalk and a body. The stalk or the funiculus (also called funicle) is present at the base and it attaches the ovule to the placenta.
Apogany is failure of fusion of gametes, which results in the development of sporophyte directly from the gametophyte. It was first reported by Farlow (1878). It produces a diploid gametophyte.
Uttarakhand PMT-2004
Sexual Reproduction in Flowering Plants
262657
The fertilized secondary nucleus of the ovule, during double fertilization, establishes the
1 seed coat
2 embryo plant
3 endosperm
4 pericarp
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 evolved 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.
JIPMER-1999
Sexual Reproduction in Flowering Plants
262658
The nucleus of megaspore divides mitotically to form two nuclei which move to opposite poles, and thus form an embryo sac which is
1 8 nucleate
2 6 nucleate
3 4 nucleate
4 2 nucleate
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 functional 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.
In a flowering plant, megaspore develops into an embryo sac. Which contain 7 cells and 8 nuclei. 3 cells ( 2 synergid +1 egg cell) are form egg apparatus mid of which called egg cell and present at micropylar end. On cell present at middle of the embryo sac called secondary nuclei. Which contain two nuclei. And rest 3 cells are form antipodal cell and present at chalazal end.
J and K CET-2014
Sexual Reproduction in Flowering Plants
262660
The ovule of angiosperm is technically known as
1 Megaspore mother cell
2 Megasporangium
3 Megaspore
4 Megasporophyll
Explanation:
The ovule of angiosperm is technically known as megasporangium, Megasporangium is equivalent to the ovule. ovule is also called megasporangium and is protected by one or two covering called integuments. A mature ovule consists of a stalk and a body. The stalk or the funiculus (also called funicle) is present at the base and it attaches the ovule to the placenta.