262775
The arrangement of the nuclei in a normal embryo sac in the dicot plants is-
1 \(2+4+2\)
2 \(3+2+3\)
3 \(2+3+3\)
4 \(3+3+2\)
Explanation:
The megaspore have nucleus. The function nucleus divided mitotically until the 8-nucleated stage of the embryo sac, but they are free by cell wall. After the 8-nucleate stage, cell walls are formed and organization of female gametophyte. On looking inside embryo sac we found, three cell are grouped together at the micropylar end and constitute the egg apparatus. The egg apparatus is turn, consists of two synergids on one egg cell. The three cell are at the chalazal end and central has two polar nuclei and the embryosac is 8 nucleate and 7 -celled.
AIPMT-2006
Sexual Reproduction in Flowering Plants
262776
Genes for cytoplasmic male sterility in plants are generally located in -
1 Nuclear genome
2 Chloroplast genome
3 Cytosol
4 Mitochondrial genome
Explanation:
Genes for cytoplasmic male sterility in plants are generally located in mitochondrial genome because mitochondria are inherited exclusively from the maternal parent means that cytoplasmic stability is maternally inherited trate. - CMS occur in plant due to specific nuclear and mitochondrial interaction. - Male sterility is the failure of plants to produce functional anther, pollen or male gametes.
AIPMT-2005
Sexual Reproduction in Flowering Plants
262777
Which one of the following statements is wrong
1 Pollen grains in some plants remain viable for months
2 Intine is made up of cellulose and pectin
3 When pollen is shed at two-celled state, double fertilization does not take place
4 Vegetative cells is larger than generative cell
Explanation:
In double fertilization, one of the two male gametes within the pollen tube fuses with the egg cell of the ovule. - Before pollination the protoplast of pollen grain divides into two unequal cells small generative cell and large tube or vegetative cell. - In some species the generative cell divides into two male gametes prior to dehiscence by pollen grain. Therefore at the time of pollination the pollen grain is either 2 celled or 3 celled.
AIPMT (Mains)-2012
Sexual Reproduction in Flowering Plants
262782
Upon fertilization, what structure develops from carpel?
1 Testa
2 Tegmen
3 Pericarp
4 Perisperm
Explanation:
Upon fertilization, while ovule develops into a seed. Pericarp develops from carpel. The pericarp is the outer layer of a fruit, and it develops from the ovary wall of the flower after fertilization. The pericarp is made up to three layer the exocarp (outer layer) the mesocarp (middle layer) and the endocarp (inner layer). In a citrus fruit, the epicarp and mesocarp make up the peel.
AIIMS-2009
Sexual Reproduction in Flowering Plants
262794
The ovary after fertilization is converted into
1 Embryo
2 Endosperm
3 Fruit
4 Seed
Explanation:
The ovary after fertilization is converted into fruits. During double fertilisaiton. One male gamete fuses with egg cell and give rise to a diploid zygote which form embryo after several divisons. The second male gamete fuses with secondary nucleus and form endosperm which provide nutrition to the developing embryo. After fertilization ovules are converted into seeds and fertilized ovary is called fruit.
262775
The arrangement of the nuclei in a normal embryo sac in the dicot plants is-
1 \(2+4+2\)
2 \(3+2+3\)
3 \(2+3+3\)
4 \(3+3+2\)
Explanation:
The megaspore have nucleus. The function nucleus divided mitotically until the 8-nucleated stage of the embryo sac, but they are free by cell wall. After the 8-nucleate stage, cell walls are formed and organization of female gametophyte. On looking inside embryo sac we found, three cell are grouped together at the micropylar end and constitute the egg apparatus. The egg apparatus is turn, consists of two synergids on one egg cell. The three cell are at the chalazal end and central has two polar nuclei and the embryosac is 8 nucleate and 7 -celled.
AIPMT-2006
Sexual Reproduction in Flowering Plants
262776
Genes for cytoplasmic male sterility in plants are generally located in -
1 Nuclear genome
2 Chloroplast genome
3 Cytosol
4 Mitochondrial genome
Explanation:
Genes for cytoplasmic male sterility in plants are generally located in mitochondrial genome because mitochondria are inherited exclusively from the maternal parent means that cytoplasmic stability is maternally inherited trate. - CMS occur in plant due to specific nuclear and mitochondrial interaction. - Male sterility is the failure of plants to produce functional anther, pollen or male gametes.
AIPMT-2005
Sexual Reproduction in Flowering Plants
262777
Which one of the following statements is wrong
1 Pollen grains in some plants remain viable for months
2 Intine is made up of cellulose and pectin
3 When pollen is shed at two-celled state, double fertilization does not take place
4 Vegetative cells is larger than generative cell
Explanation:
In double fertilization, one of the two male gametes within the pollen tube fuses with the egg cell of the ovule. - Before pollination the protoplast of pollen grain divides into two unequal cells small generative cell and large tube or vegetative cell. - In some species the generative cell divides into two male gametes prior to dehiscence by pollen grain. Therefore at the time of pollination the pollen grain is either 2 celled or 3 celled.
AIPMT (Mains)-2012
Sexual Reproduction in Flowering Plants
262782
Upon fertilization, what structure develops from carpel?
1 Testa
2 Tegmen
3 Pericarp
4 Perisperm
Explanation:
Upon fertilization, while ovule develops into a seed. Pericarp develops from carpel. The pericarp is the outer layer of a fruit, and it develops from the ovary wall of the flower after fertilization. The pericarp is made up to three layer the exocarp (outer layer) the mesocarp (middle layer) and the endocarp (inner layer). In a citrus fruit, the epicarp and mesocarp make up the peel.
AIIMS-2009
Sexual Reproduction in Flowering Plants
262794
The ovary after fertilization is converted into
1 Embryo
2 Endosperm
3 Fruit
4 Seed
Explanation:
The ovary after fertilization is converted into fruits. During double fertilisaiton. One male gamete fuses with egg cell and give rise to a diploid zygote which form embryo after several divisons. The second male gamete fuses with secondary nucleus and form endosperm which provide nutrition to the developing embryo. After fertilization ovules are converted into seeds and fertilized ovary is called fruit.
262775
The arrangement of the nuclei in a normal embryo sac in the dicot plants is-
1 \(2+4+2\)
2 \(3+2+3\)
3 \(2+3+3\)
4 \(3+3+2\)
Explanation:
The megaspore have nucleus. The function nucleus divided mitotically until the 8-nucleated stage of the embryo sac, but they are free by cell wall. After the 8-nucleate stage, cell walls are formed and organization of female gametophyte. On looking inside embryo sac we found, three cell are grouped together at the micropylar end and constitute the egg apparatus. The egg apparatus is turn, consists of two synergids on one egg cell. The three cell are at the chalazal end and central has two polar nuclei and the embryosac is 8 nucleate and 7 -celled.
AIPMT-2006
Sexual Reproduction in Flowering Plants
262776
Genes for cytoplasmic male sterility in plants are generally located in -
1 Nuclear genome
2 Chloroplast genome
3 Cytosol
4 Mitochondrial genome
Explanation:
Genes for cytoplasmic male sterility in plants are generally located in mitochondrial genome because mitochondria are inherited exclusively from the maternal parent means that cytoplasmic stability is maternally inherited trate. - CMS occur in plant due to specific nuclear and mitochondrial interaction. - Male sterility is the failure of plants to produce functional anther, pollen or male gametes.
AIPMT-2005
Sexual Reproduction in Flowering Plants
262777
Which one of the following statements is wrong
1 Pollen grains in some plants remain viable for months
2 Intine is made up of cellulose and pectin
3 When pollen is shed at two-celled state, double fertilization does not take place
4 Vegetative cells is larger than generative cell
Explanation:
In double fertilization, one of the two male gametes within the pollen tube fuses with the egg cell of the ovule. - Before pollination the protoplast of pollen grain divides into two unequal cells small generative cell and large tube or vegetative cell. - In some species the generative cell divides into two male gametes prior to dehiscence by pollen grain. Therefore at the time of pollination the pollen grain is either 2 celled or 3 celled.
AIPMT (Mains)-2012
Sexual Reproduction in Flowering Plants
262782
Upon fertilization, what structure develops from carpel?
1 Testa
2 Tegmen
3 Pericarp
4 Perisperm
Explanation:
Upon fertilization, while ovule develops into a seed. Pericarp develops from carpel. The pericarp is the outer layer of a fruit, and it develops from the ovary wall of the flower after fertilization. The pericarp is made up to three layer the exocarp (outer layer) the mesocarp (middle layer) and the endocarp (inner layer). In a citrus fruit, the epicarp and mesocarp make up the peel.
AIIMS-2009
Sexual Reproduction in Flowering Plants
262794
The ovary after fertilization is converted into
1 Embryo
2 Endosperm
3 Fruit
4 Seed
Explanation:
The ovary after fertilization is converted into fruits. During double fertilisaiton. One male gamete fuses with egg cell and give rise to a diploid zygote which form embryo after several divisons. The second male gamete fuses with secondary nucleus and form endosperm which provide nutrition to the developing embryo. After fertilization ovules are converted into seeds and fertilized ovary is called fruit.
262775
The arrangement of the nuclei in a normal embryo sac in the dicot plants is-
1 \(2+4+2\)
2 \(3+2+3\)
3 \(2+3+3\)
4 \(3+3+2\)
Explanation:
The megaspore have nucleus. The function nucleus divided mitotically until the 8-nucleated stage of the embryo sac, but they are free by cell wall. After the 8-nucleate stage, cell walls are formed and organization of female gametophyte. On looking inside embryo sac we found, three cell are grouped together at the micropylar end and constitute the egg apparatus. The egg apparatus is turn, consists of two synergids on one egg cell. The three cell are at the chalazal end and central has two polar nuclei and the embryosac is 8 nucleate and 7 -celled.
AIPMT-2006
Sexual Reproduction in Flowering Plants
262776
Genes for cytoplasmic male sterility in plants are generally located in -
1 Nuclear genome
2 Chloroplast genome
3 Cytosol
4 Mitochondrial genome
Explanation:
Genes for cytoplasmic male sterility in plants are generally located in mitochondrial genome because mitochondria are inherited exclusively from the maternal parent means that cytoplasmic stability is maternally inherited trate. - CMS occur in plant due to specific nuclear and mitochondrial interaction. - Male sterility is the failure of plants to produce functional anther, pollen or male gametes.
AIPMT-2005
Sexual Reproduction in Flowering Plants
262777
Which one of the following statements is wrong
1 Pollen grains in some plants remain viable for months
2 Intine is made up of cellulose and pectin
3 When pollen is shed at two-celled state, double fertilization does not take place
4 Vegetative cells is larger than generative cell
Explanation:
In double fertilization, one of the two male gametes within the pollen tube fuses with the egg cell of the ovule. - Before pollination the protoplast of pollen grain divides into two unequal cells small generative cell and large tube or vegetative cell. - In some species the generative cell divides into two male gametes prior to dehiscence by pollen grain. Therefore at the time of pollination the pollen grain is either 2 celled or 3 celled.
AIPMT (Mains)-2012
Sexual Reproduction in Flowering Plants
262782
Upon fertilization, what structure develops from carpel?
1 Testa
2 Tegmen
3 Pericarp
4 Perisperm
Explanation:
Upon fertilization, while ovule develops into a seed. Pericarp develops from carpel. The pericarp is the outer layer of a fruit, and it develops from the ovary wall of the flower after fertilization. The pericarp is made up to three layer the exocarp (outer layer) the mesocarp (middle layer) and the endocarp (inner layer). In a citrus fruit, the epicarp and mesocarp make up the peel.
AIIMS-2009
Sexual Reproduction in Flowering Plants
262794
The ovary after fertilization is converted into
1 Embryo
2 Endosperm
3 Fruit
4 Seed
Explanation:
The ovary after fertilization is converted into fruits. During double fertilisaiton. One male gamete fuses with egg cell and give rise to a diploid zygote which form embryo after several divisons. The second male gamete fuses with secondary nucleus and form endosperm which provide nutrition to the developing embryo. After fertilization ovules are converted into seeds and fertilized ovary is called fruit.
262775
The arrangement of the nuclei in a normal embryo sac in the dicot plants is-
1 \(2+4+2\)
2 \(3+2+3\)
3 \(2+3+3\)
4 \(3+3+2\)
Explanation:
The megaspore have nucleus. The function nucleus divided mitotically until the 8-nucleated stage of the embryo sac, but they are free by cell wall. After the 8-nucleate stage, cell walls are formed and organization of female gametophyte. On looking inside embryo sac we found, three cell are grouped together at the micropylar end and constitute the egg apparatus. The egg apparatus is turn, consists of two synergids on one egg cell. The three cell are at the chalazal end and central has two polar nuclei and the embryosac is 8 nucleate and 7 -celled.
AIPMT-2006
Sexual Reproduction in Flowering Plants
262776
Genes for cytoplasmic male sterility in plants are generally located in -
1 Nuclear genome
2 Chloroplast genome
3 Cytosol
4 Mitochondrial genome
Explanation:
Genes for cytoplasmic male sterility in plants are generally located in mitochondrial genome because mitochondria are inherited exclusively from the maternal parent means that cytoplasmic stability is maternally inherited trate. - CMS occur in plant due to specific nuclear and mitochondrial interaction. - Male sterility is the failure of plants to produce functional anther, pollen or male gametes.
AIPMT-2005
Sexual Reproduction in Flowering Plants
262777
Which one of the following statements is wrong
1 Pollen grains in some plants remain viable for months
2 Intine is made up of cellulose and pectin
3 When pollen is shed at two-celled state, double fertilization does not take place
4 Vegetative cells is larger than generative cell
Explanation:
In double fertilization, one of the two male gametes within the pollen tube fuses with the egg cell of the ovule. - Before pollination the protoplast of pollen grain divides into two unequal cells small generative cell and large tube or vegetative cell. - In some species the generative cell divides into two male gametes prior to dehiscence by pollen grain. Therefore at the time of pollination the pollen grain is either 2 celled or 3 celled.
AIPMT (Mains)-2012
Sexual Reproduction in Flowering Plants
262782
Upon fertilization, what structure develops from carpel?
1 Testa
2 Tegmen
3 Pericarp
4 Perisperm
Explanation:
Upon fertilization, while ovule develops into a seed. Pericarp develops from carpel. The pericarp is the outer layer of a fruit, and it develops from the ovary wall of the flower after fertilization. The pericarp is made up to three layer the exocarp (outer layer) the mesocarp (middle layer) and the endocarp (inner layer). In a citrus fruit, the epicarp and mesocarp make up the peel.
AIIMS-2009
Sexual Reproduction in Flowering Plants
262794
The ovary after fertilization is converted into
1 Embryo
2 Endosperm
3 Fruit
4 Seed
Explanation:
The ovary after fertilization is converted into fruits. During double fertilisaiton. One male gamete fuses with egg cell and give rise to a diploid zygote which form embryo after several divisons. The second male gamete fuses with secondary nucleus and form endosperm which provide nutrition to the developing embryo. After fertilization ovules are converted into seeds and fertilized ovary is called fruit.
