341907
In a flower, if megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspore develops into an embryo sac, its nuclei would be
1 Haploid
2 Diploid
3 A few haploid and a few diploid
4 With varying ploidy
Explanation:
In a flower, if megaspore mother cell forms megaspore without undergoing meiosis and if one on the megaspore develops into an embryo sac, its nuclei would be Diploid as there is no meiosis.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341908
In dicot plants, arrangement of nuclei in normal embryosac is
1 3+2+2
2 3+2+3
3 3+3+3
4 2+3+3
Explanation:
During the development the single nucleus of functional megaspore undergoes 3 mitotic divisions to form 8 nuclei. Among the 8 nuclei, 4 are present at Micropylar end and 4 are present at chalazal end. One nucleus from each comes to centre and forms 2 polar nuclei. 3 nuclei at Micropylar end forms egg apparatus and 3 nuclei at Micropylar end forms antipodals. Hence the arrangement is 3+2+3.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341909
How many embryo sacs are present in an ovule?
1 Few embryo sac
2 More than one embryo sac
3 One embryo sac (generally)
4 Two embryo sac
Explanation:
An ovule generally has a single embryo sac formed from a megaspore.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341910
Which of the following statements is/are true? i. Endothecium lies beneath the epidermis ii. Fusion of egg with male gamete is called apogamy iii. Synergids are haploid iv. The point at which funicle touches the ovule is raphe
1 i and iv only
2 i and ii only
3 ii and iv only
4 i and iii only
Explanation:
The statements can be corrected as ii. Fusion of egg with male gamete is called syngamy iv. The point at which funicle touches the ovule is hilum
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341911
The functional megaspore undergoes :
1 3 meiotic divisions to form embryo sac
2 2 meiotic divisions to form embryo sac
3 3 mitotic divisions
4 2 mitotic divisions
Explanation:
The functional megaspore undergoes 3 mitotic divisions to give rise 8 nucleate and 7-celled structure.
341907
In a flower, if megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspore develops into an embryo sac, its nuclei would be
1 Haploid
2 Diploid
3 A few haploid and a few diploid
4 With varying ploidy
Explanation:
In a flower, if megaspore mother cell forms megaspore without undergoing meiosis and if one on the megaspore develops into an embryo sac, its nuclei would be Diploid as there is no meiosis.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341908
In dicot plants, arrangement of nuclei in normal embryosac is
1 3+2+2
2 3+2+3
3 3+3+3
4 2+3+3
Explanation:
During the development the single nucleus of functional megaspore undergoes 3 mitotic divisions to form 8 nuclei. Among the 8 nuclei, 4 are present at Micropylar end and 4 are present at chalazal end. One nucleus from each comes to centre and forms 2 polar nuclei. 3 nuclei at Micropylar end forms egg apparatus and 3 nuclei at Micropylar end forms antipodals. Hence the arrangement is 3+2+3.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341909
How many embryo sacs are present in an ovule?
1 Few embryo sac
2 More than one embryo sac
3 One embryo sac (generally)
4 Two embryo sac
Explanation:
An ovule generally has a single embryo sac formed from a megaspore.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341910
Which of the following statements is/are true? i. Endothecium lies beneath the epidermis ii. Fusion of egg with male gamete is called apogamy iii. Synergids are haploid iv. The point at which funicle touches the ovule is raphe
1 i and iv only
2 i and ii only
3 ii and iv only
4 i and iii only
Explanation:
The statements can be corrected as ii. Fusion of egg with male gamete is called syngamy iv. The point at which funicle touches the ovule is hilum
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341911
The functional megaspore undergoes :
1 3 meiotic divisions to form embryo sac
2 2 meiotic divisions to form embryo sac
3 3 mitotic divisions
4 2 mitotic divisions
Explanation:
The functional megaspore undergoes 3 mitotic divisions to give rise 8 nucleate and 7-celled structure.
341907
In a flower, if megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspore develops into an embryo sac, its nuclei would be
1 Haploid
2 Diploid
3 A few haploid and a few diploid
4 With varying ploidy
Explanation:
In a flower, if megaspore mother cell forms megaspore without undergoing meiosis and if one on the megaspore develops into an embryo sac, its nuclei would be Diploid as there is no meiosis.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341908
In dicot plants, arrangement of nuclei in normal embryosac is
1 3+2+2
2 3+2+3
3 3+3+3
4 2+3+3
Explanation:
During the development the single nucleus of functional megaspore undergoes 3 mitotic divisions to form 8 nuclei. Among the 8 nuclei, 4 are present at Micropylar end and 4 are present at chalazal end. One nucleus from each comes to centre and forms 2 polar nuclei. 3 nuclei at Micropylar end forms egg apparatus and 3 nuclei at Micropylar end forms antipodals. Hence the arrangement is 3+2+3.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341909
How many embryo sacs are present in an ovule?
1 Few embryo sac
2 More than one embryo sac
3 One embryo sac (generally)
4 Two embryo sac
Explanation:
An ovule generally has a single embryo sac formed from a megaspore.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341910
Which of the following statements is/are true? i. Endothecium lies beneath the epidermis ii. Fusion of egg with male gamete is called apogamy iii. Synergids are haploid iv. The point at which funicle touches the ovule is raphe
1 i and iv only
2 i and ii only
3 ii and iv only
4 i and iii only
Explanation:
The statements can be corrected as ii. Fusion of egg with male gamete is called syngamy iv. The point at which funicle touches the ovule is hilum
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341911
The functional megaspore undergoes :
1 3 meiotic divisions to form embryo sac
2 2 meiotic divisions to form embryo sac
3 3 mitotic divisions
4 2 mitotic divisions
Explanation:
The functional megaspore undergoes 3 mitotic divisions to give rise 8 nucleate and 7-celled structure.
341907
In a flower, if megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspore develops into an embryo sac, its nuclei would be
1 Haploid
2 Diploid
3 A few haploid and a few diploid
4 With varying ploidy
Explanation:
In a flower, if megaspore mother cell forms megaspore without undergoing meiosis and if one on the megaspore develops into an embryo sac, its nuclei would be Diploid as there is no meiosis.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341908
In dicot plants, arrangement of nuclei in normal embryosac is
1 3+2+2
2 3+2+3
3 3+3+3
4 2+3+3
Explanation:
During the development the single nucleus of functional megaspore undergoes 3 mitotic divisions to form 8 nuclei. Among the 8 nuclei, 4 are present at Micropylar end and 4 are present at chalazal end. One nucleus from each comes to centre and forms 2 polar nuclei. 3 nuclei at Micropylar end forms egg apparatus and 3 nuclei at Micropylar end forms antipodals. Hence the arrangement is 3+2+3.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341909
How many embryo sacs are present in an ovule?
1 Few embryo sac
2 More than one embryo sac
3 One embryo sac (generally)
4 Two embryo sac
Explanation:
An ovule generally has a single embryo sac formed from a megaspore.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341910
Which of the following statements is/are true? i. Endothecium lies beneath the epidermis ii. Fusion of egg with male gamete is called apogamy iii. Synergids are haploid iv. The point at which funicle touches the ovule is raphe
1 i and iv only
2 i and ii only
3 ii and iv only
4 i and iii only
Explanation:
The statements can be corrected as ii. Fusion of egg with male gamete is called syngamy iv. The point at which funicle touches the ovule is hilum
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341911
The functional megaspore undergoes :
1 3 meiotic divisions to form embryo sac
2 2 meiotic divisions to form embryo sac
3 3 mitotic divisions
4 2 mitotic divisions
Explanation:
The functional megaspore undergoes 3 mitotic divisions to give rise 8 nucleate and 7-celled structure.
341907
In a flower, if megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspore develops into an embryo sac, its nuclei would be
1 Haploid
2 Diploid
3 A few haploid and a few diploid
4 With varying ploidy
Explanation:
In a flower, if megaspore mother cell forms megaspore without undergoing meiosis and if one on the megaspore develops into an embryo sac, its nuclei would be Diploid as there is no meiosis.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341908
In dicot plants, arrangement of nuclei in normal embryosac is
1 3+2+2
2 3+2+3
3 3+3+3
4 2+3+3
Explanation:
During the development the single nucleus of functional megaspore undergoes 3 mitotic divisions to form 8 nuclei. Among the 8 nuclei, 4 are present at Micropylar end and 4 are present at chalazal end. One nucleus from each comes to centre and forms 2 polar nuclei. 3 nuclei at Micropylar end forms egg apparatus and 3 nuclei at Micropylar end forms antipodals. Hence the arrangement is 3+2+3.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341909
How many embryo sacs are present in an ovule?
1 Few embryo sac
2 More than one embryo sac
3 One embryo sac (generally)
4 Two embryo sac
Explanation:
An ovule generally has a single embryo sac formed from a megaspore.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341910
Which of the following statements is/are true? i. Endothecium lies beneath the epidermis ii. Fusion of egg with male gamete is called apogamy iii. Synergids are haploid iv. The point at which funicle touches the ovule is raphe
1 i and iv only
2 i and ii only
3 ii and iv only
4 i and iii only
Explanation:
The statements can be corrected as ii. Fusion of egg with male gamete is called syngamy iv. The point at which funicle touches the ovule is hilum
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341911
The functional megaspore undergoes :
1 3 meiotic divisions to form embryo sac
2 2 meiotic divisions to form embryo sac
3 3 mitotic divisions
4 2 mitotic divisions
Explanation:
The functional megaspore undergoes 3 mitotic divisions to give rise 8 nucleate and 7-celled structure.
