Polar nuclei are located in the centre of embryo sac. Embryo sac is 7 celled- 8 nucleate structure in which one egg cell and two synergid are present at micropylar end, three antipodal cells are present at chalazal end and two nucleus present at center called polar nuclei. Thalamus is thickened structure present at the base of flower and hold all the flower parts. It is also known as receptacle.
Haryana PMT-2003
Sexual Reproduction in Flowering Plants
262680
The haustorial behaviour where entire embryo sac grows beyond the ovule tissue occur in
1 Santalum
2 Zea mays
3 Argemone
4 Datura
Explanation:
The haustorial behavior where entire embryo sac grow beyond the ovular tissue occur in Santalum. Haustoria is a outgrowth that can penetrate other tissues to absorb nutrients. Both synergids and antipodal cells may develop haustoria in embryo sac.
CG PMT-2010
Sexual Reproduction in Flowering Plants
262681
Development of embryo from nucellar cell is common in many varieties of
1 Citrus
2 Sunflower
3 Oat
4 Marigold
Explanation:
Development of embryo from nucellar cell is common in many varieties of citrus plants. It is called as Nucellar embryony and it is a type of apomixis.
Rajasthan PMT-2011
Sexual Reproduction in Flowering Plants
262683
In the fully organised Polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?
1 \(3: 1: 3\)
2 \(6: 0: 1\)
3 \(6: 1: 0\)
4 \(3: 2: 3\)
Explanation:
In the fully organized polygonum type of embryo sac, 6:1:0 is the ratio of haploid, diploid and triploid nuclei. Polygonum type of embryo sac is 7celled, 8 nucleate structure. There are 6 haploid nuclei, 2 synergids one egg cell and three antipodals and 1 diploid nuclei which is called as polar nuclei.
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Sexual Reproduction in Flowering Plants
262675
Polar nuclei are located in :
1 embryo sac
2 thalamus
3 pollen tube
4 ovule
Explanation:
Polar nuclei are located in the centre of embryo sac. Embryo sac is 7 celled- 8 nucleate structure in which one egg cell and two synergid are present at micropylar end, three antipodal cells are present at chalazal end and two nucleus present at center called polar nuclei. Thalamus is thickened structure present at the base of flower and hold all the flower parts. It is also known as receptacle.
Haryana PMT-2003
Sexual Reproduction in Flowering Plants
262680
The haustorial behaviour where entire embryo sac grows beyond the ovule tissue occur in
1 Santalum
2 Zea mays
3 Argemone
4 Datura
Explanation:
The haustorial behavior where entire embryo sac grow beyond the ovular tissue occur in Santalum. Haustoria is a outgrowth that can penetrate other tissues to absorb nutrients. Both synergids and antipodal cells may develop haustoria in embryo sac.
CG PMT-2010
Sexual Reproduction in Flowering Plants
262681
Development of embryo from nucellar cell is common in many varieties of
1 Citrus
2 Sunflower
3 Oat
4 Marigold
Explanation:
Development of embryo from nucellar cell is common in many varieties of citrus plants. It is called as Nucellar embryony and it is a type of apomixis.
Rajasthan PMT-2011
Sexual Reproduction in Flowering Plants
262683
In the fully organised Polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?
1 \(3: 1: 3\)
2 \(6: 0: 1\)
3 \(6: 1: 0\)
4 \(3: 2: 3\)
Explanation:
In the fully organized polygonum type of embryo sac, 6:1:0 is the ratio of haploid, diploid and triploid nuclei. Polygonum type of embryo sac is 7celled, 8 nucleate structure. There are 6 haploid nuclei, 2 synergids one egg cell and three antipodals and 1 diploid nuclei which is called as polar nuclei.
Polar nuclei are located in the centre of embryo sac. Embryo sac is 7 celled- 8 nucleate structure in which one egg cell and two synergid are present at micropylar end, three antipodal cells are present at chalazal end and two nucleus present at center called polar nuclei. Thalamus is thickened structure present at the base of flower and hold all the flower parts. It is also known as receptacle.
Haryana PMT-2003
Sexual Reproduction in Flowering Plants
262680
The haustorial behaviour where entire embryo sac grows beyond the ovule tissue occur in
1 Santalum
2 Zea mays
3 Argemone
4 Datura
Explanation:
The haustorial behavior where entire embryo sac grow beyond the ovular tissue occur in Santalum. Haustoria is a outgrowth that can penetrate other tissues to absorb nutrients. Both synergids and antipodal cells may develop haustoria in embryo sac.
CG PMT-2010
Sexual Reproduction in Flowering Plants
262681
Development of embryo from nucellar cell is common in many varieties of
1 Citrus
2 Sunflower
3 Oat
4 Marigold
Explanation:
Development of embryo from nucellar cell is common in many varieties of citrus plants. It is called as Nucellar embryony and it is a type of apomixis.
Rajasthan PMT-2011
Sexual Reproduction in Flowering Plants
262683
In the fully organised Polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?
1 \(3: 1: 3\)
2 \(6: 0: 1\)
3 \(6: 1: 0\)
4 \(3: 2: 3\)
Explanation:
In the fully organized polygonum type of embryo sac, 6:1:0 is the ratio of haploid, diploid and triploid nuclei. Polygonum type of embryo sac is 7celled, 8 nucleate structure. There are 6 haploid nuclei, 2 synergids one egg cell and three antipodals and 1 diploid nuclei which is called as polar nuclei.
Polar nuclei are located in the centre of embryo sac. Embryo sac is 7 celled- 8 nucleate structure in which one egg cell and two synergid are present at micropylar end, three antipodal cells are present at chalazal end and two nucleus present at center called polar nuclei. Thalamus is thickened structure present at the base of flower and hold all the flower parts. It is also known as receptacle.
Haryana PMT-2003
Sexual Reproduction in Flowering Plants
262680
The haustorial behaviour where entire embryo sac grows beyond the ovule tissue occur in
1 Santalum
2 Zea mays
3 Argemone
4 Datura
Explanation:
The haustorial behavior where entire embryo sac grow beyond the ovular tissue occur in Santalum. Haustoria is a outgrowth that can penetrate other tissues to absorb nutrients. Both synergids and antipodal cells may develop haustoria in embryo sac.
CG PMT-2010
Sexual Reproduction in Flowering Plants
262681
Development of embryo from nucellar cell is common in many varieties of
1 Citrus
2 Sunflower
3 Oat
4 Marigold
Explanation:
Development of embryo from nucellar cell is common in many varieties of citrus plants. It is called as Nucellar embryony and it is a type of apomixis.
Rajasthan PMT-2011
Sexual Reproduction in Flowering Plants
262683
In the fully organised Polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?
1 \(3: 1: 3\)
2 \(6: 0: 1\)
3 \(6: 1: 0\)
4 \(3: 2: 3\)
Explanation:
In the fully organized polygonum type of embryo sac, 6:1:0 is the ratio of haploid, diploid and triploid nuclei. Polygonum type of embryo sac is 7celled, 8 nucleate structure. There are 6 haploid nuclei, 2 synergids one egg cell and three antipodals and 1 diploid nuclei which is called as polar nuclei.