262600
Endosperm is formed during the double fertilization by:
1 Two polar nuclei \& one male gamete
2 One polar nuclei \& one male gamete
3 Ovum and male gamete
4 Two polar nuclei \& two male gametes
Explanation:
In angiosperm megagametophyte also called embryo sac. Double fertilization is the simultaneous occurrence of syngamy and triple fusion. Syngamy involves fusion of one male gamete with egg cell to form zygote. The result of syngamy is zygote (2n) which ultimately develops into embryo. The second male gamete fuses with 2 polar nuclei or secondary nucleus to form triploid primary endosperm nucleus (3n) ultimately develops into a nutritive tissue for developing embryo called endosperm.
262608
What does the filiform apparatus do at the entrance into ovule?
1 It brings about opening of the pollen tube
2 It guides pollen tube from a synergid to egg
3 It helps in the entry of pollen tube into a synergid
4 It prevents entry of more than one pollen tube into the embryo sac
Explanation:
Towards the micropyle side each synergid has a hook like or finger like projections called the filiform apparatus. They absorbed food from the nucellus and It helps in the entry of pollen tube into a synergid
AIPMT-2008
Sexual Reproduction in Flowering Plants
262612
Out of the seven names given below, find out haploid cells? (i) Antipodal cell (ii) Egg cell (iii) Synergid cell (iv) Polar nuclei (v) Male gamete (vi) Nuclear cell (vii) Chalazal cell
1 (i), (ii), (iv) \& (v) only
2 (ii), (iv), (vi) \& (vii) only
3 (i), (ii), (iii) \& (v) only
4 (ii), (iv), (iii) \& (i) only
Explanation:
Haplaid cells contains only a single set of chromosomes while diploid cells have 2 set of chromosomes. Antipodal cell, egg cell, synergid cell and male gametes are haploid.
AP EAMCET-03.09.2021 Shift-I
Sexual Reproduction in Flowering Plants
262613
Identify the correct sequence of events that occur during development of Embryosac
Nucellus - It is the mass of Parenchymatous tissue surrounded by integuments in an ovule. It enclose embryo Sac and provides nourishment to the developing embryo. Megaspores - The megasporangium contains megaspore mother cell, which divide by meiosis to produce haploid megaspores. Reduction division - The first cell division in meiosis the process by which germ cells are formed. Linear tetrad - A group of four meiotic products aligned linearly in such a way that sister products remain adjacent to one another. Functional megaspore - Within the nucellus a cell namely megaspore mother cell forms four haploid megaspores via meiosis forming a linear tetrad. Mitotic division - Mitosis is a process of nuclear parent division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells. Embryo sac-The embryo sac or female gametophyte is an oval structure present in the ovule of flowering plants.
262600
Endosperm is formed during the double fertilization by:
1 Two polar nuclei \& one male gamete
2 One polar nuclei \& one male gamete
3 Ovum and male gamete
4 Two polar nuclei \& two male gametes
Explanation:
In angiosperm megagametophyte also called embryo sac. Double fertilization is the simultaneous occurrence of syngamy and triple fusion. Syngamy involves fusion of one male gamete with egg cell to form zygote. The result of syngamy is zygote (2n) which ultimately develops into embryo. The second male gamete fuses with 2 polar nuclei or secondary nucleus to form triploid primary endosperm nucleus (3n) ultimately develops into a nutritive tissue for developing embryo called endosperm.
262608
What does the filiform apparatus do at the entrance into ovule?
1 It brings about opening of the pollen tube
2 It guides pollen tube from a synergid to egg
3 It helps in the entry of pollen tube into a synergid
4 It prevents entry of more than one pollen tube into the embryo sac
Explanation:
Towards the micropyle side each synergid has a hook like or finger like projections called the filiform apparatus. They absorbed food from the nucellus and It helps in the entry of pollen tube into a synergid
AIPMT-2008
Sexual Reproduction in Flowering Plants
262612
Out of the seven names given below, find out haploid cells? (i) Antipodal cell (ii) Egg cell (iii) Synergid cell (iv) Polar nuclei (v) Male gamete (vi) Nuclear cell (vii) Chalazal cell
1 (i), (ii), (iv) \& (v) only
2 (ii), (iv), (vi) \& (vii) only
3 (i), (ii), (iii) \& (v) only
4 (ii), (iv), (iii) \& (i) only
Explanation:
Haplaid cells contains only a single set of chromosomes while diploid cells have 2 set of chromosomes. Antipodal cell, egg cell, synergid cell and male gametes are haploid.
AP EAMCET-03.09.2021 Shift-I
Sexual Reproduction in Flowering Plants
262613
Identify the correct sequence of events that occur during development of Embryosac
Nucellus - It is the mass of Parenchymatous tissue surrounded by integuments in an ovule. It enclose embryo Sac and provides nourishment to the developing embryo. Megaspores - The megasporangium contains megaspore mother cell, which divide by meiosis to produce haploid megaspores. Reduction division - The first cell division in meiosis the process by which germ cells are formed. Linear tetrad - A group of four meiotic products aligned linearly in such a way that sister products remain adjacent to one another. Functional megaspore - Within the nucellus a cell namely megaspore mother cell forms four haploid megaspores via meiosis forming a linear tetrad. Mitotic division - Mitosis is a process of nuclear parent division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells. Embryo sac-The embryo sac or female gametophyte is an oval structure present in the ovule of flowering plants.
262600
Endosperm is formed during the double fertilization by:
1 Two polar nuclei \& one male gamete
2 One polar nuclei \& one male gamete
3 Ovum and male gamete
4 Two polar nuclei \& two male gametes
Explanation:
In angiosperm megagametophyte also called embryo sac. Double fertilization is the simultaneous occurrence of syngamy and triple fusion. Syngamy involves fusion of one male gamete with egg cell to form zygote. The result of syngamy is zygote (2n) which ultimately develops into embryo. The second male gamete fuses with 2 polar nuclei or secondary nucleus to form triploid primary endosperm nucleus (3n) ultimately develops into a nutritive tissue for developing embryo called endosperm.
262608
What does the filiform apparatus do at the entrance into ovule?
1 It brings about opening of the pollen tube
2 It guides pollen tube from a synergid to egg
3 It helps in the entry of pollen tube into a synergid
4 It prevents entry of more than one pollen tube into the embryo sac
Explanation:
Towards the micropyle side each synergid has a hook like or finger like projections called the filiform apparatus. They absorbed food from the nucellus and It helps in the entry of pollen tube into a synergid
AIPMT-2008
Sexual Reproduction in Flowering Plants
262612
Out of the seven names given below, find out haploid cells? (i) Antipodal cell (ii) Egg cell (iii) Synergid cell (iv) Polar nuclei (v) Male gamete (vi) Nuclear cell (vii) Chalazal cell
1 (i), (ii), (iv) \& (v) only
2 (ii), (iv), (vi) \& (vii) only
3 (i), (ii), (iii) \& (v) only
4 (ii), (iv), (iii) \& (i) only
Explanation:
Haplaid cells contains only a single set of chromosomes while diploid cells have 2 set of chromosomes. Antipodal cell, egg cell, synergid cell and male gametes are haploid.
AP EAMCET-03.09.2021 Shift-I
Sexual Reproduction in Flowering Plants
262613
Identify the correct sequence of events that occur during development of Embryosac
Nucellus - It is the mass of Parenchymatous tissue surrounded by integuments in an ovule. It enclose embryo Sac and provides nourishment to the developing embryo. Megaspores - The megasporangium contains megaspore mother cell, which divide by meiosis to produce haploid megaspores. Reduction division - The first cell division in meiosis the process by which germ cells are formed. Linear tetrad - A group of four meiotic products aligned linearly in such a way that sister products remain adjacent to one another. Functional megaspore - Within the nucellus a cell namely megaspore mother cell forms four haploid megaspores via meiosis forming a linear tetrad. Mitotic division - Mitosis is a process of nuclear parent division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells. Embryo sac-The embryo sac or female gametophyte is an oval structure present in the ovule of flowering plants.
262600
Endosperm is formed during the double fertilization by:
1 Two polar nuclei \& one male gamete
2 One polar nuclei \& one male gamete
3 Ovum and male gamete
4 Two polar nuclei \& two male gametes
Explanation:
In angiosperm megagametophyte also called embryo sac. Double fertilization is the simultaneous occurrence of syngamy and triple fusion. Syngamy involves fusion of one male gamete with egg cell to form zygote. The result of syngamy is zygote (2n) which ultimately develops into embryo. The second male gamete fuses with 2 polar nuclei or secondary nucleus to form triploid primary endosperm nucleus (3n) ultimately develops into a nutritive tissue for developing embryo called endosperm.
262608
What does the filiform apparatus do at the entrance into ovule?
1 It brings about opening of the pollen tube
2 It guides pollen tube from a synergid to egg
3 It helps in the entry of pollen tube into a synergid
4 It prevents entry of more than one pollen tube into the embryo sac
Explanation:
Towards the micropyle side each synergid has a hook like or finger like projections called the filiform apparatus. They absorbed food from the nucellus and It helps in the entry of pollen tube into a synergid
AIPMT-2008
Sexual Reproduction in Flowering Plants
262612
Out of the seven names given below, find out haploid cells? (i) Antipodal cell (ii) Egg cell (iii) Synergid cell (iv) Polar nuclei (v) Male gamete (vi) Nuclear cell (vii) Chalazal cell
1 (i), (ii), (iv) \& (v) only
2 (ii), (iv), (vi) \& (vii) only
3 (i), (ii), (iii) \& (v) only
4 (ii), (iv), (iii) \& (i) only
Explanation:
Haplaid cells contains only a single set of chromosomes while diploid cells have 2 set of chromosomes. Antipodal cell, egg cell, synergid cell and male gametes are haploid.
AP EAMCET-03.09.2021 Shift-I
Sexual Reproduction in Flowering Plants
262613
Identify the correct sequence of events that occur during development of Embryosac
Nucellus - It is the mass of Parenchymatous tissue surrounded by integuments in an ovule. It enclose embryo Sac and provides nourishment to the developing embryo. Megaspores - The megasporangium contains megaspore mother cell, which divide by meiosis to produce haploid megaspores. Reduction division - The first cell division in meiosis the process by which germ cells are formed. Linear tetrad - A group of four meiotic products aligned linearly in such a way that sister products remain adjacent to one another. Functional megaspore - Within the nucellus a cell namely megaspore mother cell forms four haploid megaspores via meiosis forming a linear tetrad. Mitotic division - Mitosis is a process of nuclear parent division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells. Embryo sac-The embryo sac or female gametophyte is an oval structure present in the ovule of flowering plants.
262600
Endosperm is formed during the double fertilization by:
1 Two polar nuclei \& one male gamete
2 One polar nuclei \& one male gamete
3 Ovum and male gamete
4 Two polar nuclei \& two male gametes
Explanation:
In angiosperm megagametophyte also called embryo sac. Double fertilization is the simultaneous occurrence of syngamy and triple fusion. Syngamy involves fusion of one male gamete with egg cell to form zygote. The result of syngamy is zygote (2n) which ultimately develops into embryo. The second male gamete fuses with 2 polar nuclei or secondary nucleus to form triploid primary endosperm nucleus (3n) ultimately develops into a nutritive tissue for developing embryo called endosperm.
262608
What does the filiform apparatus do at the entrance into ovule?
1 It brings about opening of the pollen tube
2 It guides pollen tube from a synergid to egg
3 It helps in the entry of pollen tube into a synergid
4 It prevents entry of more than one pollen tube into the embryo sac
Explanation:
Towards the micropyle side each synergid has a hook like or finger like projections called the filiform apparatus. They absorbed food from the nucellus and It helps in the entry of pollen tube into a synergid
AIPMT-2008
Sexual Reproduction in Flowering Plants
262612
Out of the seven names given below, find out haploid cells? (i) Antipodal cell (ii) Egg cell (iii) Synergid cell (iv) Polar nuclei (v) Male gamete (vi) Nuclear cell (vii) Chalazal cell
1 (i), (ii), (iv) \& (v) only
2 (ii), (iv), (vi) \& (vii) only
3 (i), (ii), (iii) \& (v) only
4 (ii), (iv), (iii) \& (i) only
Explanation:
Haplaid cells contains only a single set of chromosomes while diploid cells have 2 set of chromosomes. Antipodal cell, egg cell, synergid cell and male gametes are haploid.
AP EAMCET-03.09.2021 Shift-I
Sexual Reproduction in Flowering Plants
262613
Identify the correct sequence of events that occur during development of Embryosac
Nucellus - It is the mass of Parenchymatous tissue surrounded by integuments in an ovule. It enclose embryo Sac and provides nourishment to the developing embryo. Megaspores - The megasporangium contains megaspore mother cell, which divide by meiosis to produce haploid megaspores. Reduction division - The first cell division in meiosis the process by which germ cells are formed. Linear tetrad - A group of four meiotic products aligned linearly in such a way that sister products remain adjacent to one another. Functional megaspore - Within the nucellus a cell namely megaspore mother cell forms four haploid megaspores via meiosis forming a linear tetrad. Mitotic division - Mitosis is a process of nuclear parent division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells. Embryo sac-The embryo sac or female gametophyte is an oval structure present in the ovule of flowering plants.
