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. The ovule is the structure that contains the female reproductive cells and also gives rise to female reproductive cell. The ovary contains ovules and it develops into seeds after fertilization. The ovary contains an outer tough protective layer called integument, nucellus and the female gametophyte.
NEET-2013
Sexual Reproduction in Flowering Plants
262650
In Polygonum type of embryo sac, the cells are : (1) haploid (2) diploid (3) triploid (4) polyploidy
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
In polygonum type of embryo sac, the cells are haploid and diploid both. It is the most common type of embryo sac found in plants. Megaspore mother cell undergoes meiotic divisions to form four haploid megaspore. Out of these, three degenerate, only one remain functional. This functional megaspore undergoes mitosis three times which results in 8 nuclei in the megaspore. A mature polygonum embryo sac contains; - Egg apparatus with one egg and two synegids - Three antipodal cells - A central cell with polar nuclei.
BHU PMT (Mains)-2005
Sexual Reproduction in Flowering Plants
262625
Perisperm differs from endosperm in
1 its formation by fusion of secondary nucleus with several sperms
2 being a haploid tissue
3 having no reserve food
4 being a diploid tissue
Explanation:
Perisperm is the diploid storage tissue of fruit is nothing but nucellus of ovule that transforms after fertilization. It is located near embryo and can be divided into many layers in some seed and is single layered as well, perisperm differs from endosperm, in perisperm develops from the nucellus of the seed and the endosperm. Endosperm is the end product of triple fusion in gymnosperm endosperm formed before the fertilization and haploid but in angiosperm endosperm formed after the fertilization and usually triploid. perisperm vs Endosperm
NEET-2013
Sexual Reproduction in Flowering Plants
262626
Functional megaspore in an angiosperm develops into
1 Ovule
2 Endosperm
3 Embryo sac
4 Embryo
Explanation:
The functional megaspore (haploid) represents the first cell of the female gametophyte.In monosporic embryo sac, the megaspore mother cell divide miotically to form dyad than tetrad. Out of four megaspore three megaspores towards the micropyle side degenerate and chalazal megaspore becomes functional. The functional megaspore undergoes three sequential mitosis divisions and gives rise to the 8 nucleate and 7 celled mature embryo sac.
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. The ovule is the structure that contains the female reproductive cells and also gives rise to female reproductive cell. The ovary contains ovules and it develops into seeds after fertilization. The ovary contains an outer tough protective layer called integument, nucellus and the female gametophyte.
NEET-2013
Sexual Reproduction in Flowering Plants
262650
In Polygonum type of embryo sac, the cells are : (1) haploid (2) diploid (3) triploid (4) polyploidy
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
In polygonum type of embryo sac, the cells are haploid and diploid both. It is the most common type of embryo sac found in plants. Megaspore mother cell undergoes meiotic divisions to form four haploid megaspore. Out of these, three degenerate, only one remain functional. This functional megaspore undergoes mitosis three times which results in 8 nuclei in the megaspore. A mature polygonum embryo sac contains; - Egg apparatus with one egg and two synegids - Three antipodal cells - A central cell with polar nuclei.
BHU PMT (Mains)-2005
Sexual Reproduction in Flowering Plants
262625
Perisperm differs from endosperm in
1 its formation by fusion of secondary nucleus with several sperms
2 being a haploid tissue
3 having no reserve food
4 being a diploid tissue
Explanation:
Perisperm is the diploid storage tissue of fruit is nothing but nucellus of ovule that transforms after fertilization. It is located near embryo and can be divided into many layers in some seed and is single layered as well, perisperm differs from endosperm, in perisperm develops from the nucellus of the seed and the endosperm. Endosperm is the end product of triple fusion in gymnosperm endosperm formed before the fertilization and haploid but in angiosperm endosperm formed after the fertilization and usually triploid. perisperm vs Endosperm
NEET-2013
Sexual Reproduction in Flowering Plants
262626
Functional megaspore in an angiosperm develops into
1 Ovule
2 Endosperm
3 Embryo sac
4 Embryo
Explanation:
The functional megaspore (haploid) represents the first cell of the female gametophyte.In monosporic embryo sac, the megaspore mother cell divide miotically to form dyad than tetrad. Out of four megaspore three megaspores towards the micropyle side degenerate and chalazal megaspore becomes functional. The functional megaspore undergoes three sequential mitosis divisions and gives rise to the 8 nucleate and 7 celled mature embryo sac.
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. The ovule is the structure that contains the female reproductive cells and also gives rise to female reproductive cell. The ovary contains ovules and it develops into seeds after fertilization. The ovary contains an outer tough protective layer called integument, nucellus and the female gametophyte.
NEET-2013
Sexual Reproduction in Flowering Plants
262650
In Polygonum type of embryo sac, the cells are : (1) haploid (2) diploid (3) triploid (4) polyploidy
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
In polygonum type of embryo sac, the cells are haploid and diploid both. It is the most common type of embryo sac found in plants. Megaspore mother cell undergoes meiotic divisions to form four haploid megaspore. Out of these, three degenerate, only one remain functional. This functional megaspore undergoes mitosis three times which results in 8 nuclei in the megaspore. A mature polygonum embryo sac contains; - Egg apparatus with one egg and two synegids - Three antipodal cells - A central cell with polar nuclei.
BHU PMT (Mains)-2005
Sexual Reproduction in Flowering Plants
262625
Perisperm differs from endosperm in
1 its formation by fusion of secondary nucleus with several sperms
2 being a haploid tissue
3 having no reserve food
4 being a diploid tissue
Explanation:
Perisperm is the diploid storage tissue of fruit is nothing but nucellus of ovule that transforms after fertilization. It is located near embryo and can be divided into many layers in some seed and is single layered as well, perisperm differs from endosperm, in perisperm develops from the nucellus of the seed and the endosperm. Endosperm is the end product of triple fusion in gymnosperm endosperm formed before the fertilization and haploid but in angiosperm endosperm formed after the fertilization and usually triploid. perisperm vs Endosperm
NEET-2013
Sexual Reproduction in Flowering Plants
262626
Functional megaspore in an angiosperm develops into
1 Ovule
2 Endosperm
3 Embryo sac
4 Embryo
Explanation:
The functional megaspore (haploid) represents the first cell of the female gametophyte.In monosporic embryo sac, the megaspore mother cell divide miotically to form dyad than tetrad. Out of four megaspore three megaspores towards the micropyle side degenerate and chalazal megaspore becomes functional. The functional megaspore undergoes three sequential mitosis divisions and gives rise to the 8 nucleate and 7 celled mature embryo sac.
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. The ovule is the structure that contains the female reproductive cells and also gives rise to female reproductive cell. The ovary contains ovules and it develops into seeds after fertilization. The ovary contains an outer tough protective layer called integument, nucellus and the female gametophyte.
NEET-2013
Sexual Reproduction in Flowering Plants
262650
In Polygonum type of embryo sac, the cells are : (1) haploid (2) diploid (3) triploid (4) polyploidy
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
In polygonum type of embryo sac, the cells are haploid and diploid both. It is the most common type of embryo sac found in plants. Megaspore mother cell undergoes meiotic divisions to form four haploid megaspore. Out of these, three degenerate, only one remain functional. This functional megaspore undergoes mitosis three times which results in 8 nuclei in the megaspore. A mature polygonum embryo sac contains; - Egg apparatus with one egg and two synegids - Three antipodal cells - A central cell with polar nuclei.
BHU PMT (Mains)-2005
Sexual Reproduction in Flowering Plants
262625
Perisperm differs from endosperm in
1 its formation by fusion of secondary nucleus with several sperms
2 being a haploid tissue
3 having no reserve food
4 being a diploid tissue
Explanation:
Perisperm is the diploid storage tissue of fruit is nothing but nucellus of ovule that transforms after fertilization. It is located near embryo and can be divided into many layers in some seed and is single layered as well, perisperm differs from endosperm, in perisperm develops from the nucellus of the seed and the endosperm. Endosperm is the end product of triple fusion in gymnosperm endosperm formed before the fertilization and haploid but in angiosperm endosperm formed after the fertilization and usually triploid. perisperm vs Endosperm
NEET-2013
Sexual Reproduction in Flowering Plants
262626
Functional megaspore in an angiosperm develops into
1 Ovule
2 Endosperm
3 Embryo sac
4 Embryo
Explanation:
The functional megaspore (haploid) represents the first cell of the female gametophyte.In monosporic embryo sac, the megaspore mother cell divide miotically to form dyad than tetrad. Out of four megaspore three megaspores towards the micropyle side degenerate and chalazal megaspore becomes functional. The functional megaspore undergoes three sequential mitosis divisions and gives rise to the 8 nucleate and 7 celled mature embryo sac.
