341872
Assertion : 7-celled, 8 nucleate and monosporic embryo sac is called Polygonum type of embryo sac. Reason : It was discovered by Hofmeister for the first time in Polygonum.
1 Both Assertion and Reason are true and Reason is correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
Explanation:
Embryo sac is the female gametophyte of angiosperms. It was observed by Hofmeister first time. Polygonum type of embryo sac is most simple, most primitive and normal, type of embryo sac. It is 7 celled, 8 -nucleate and monosporic embryo sac. It was discovered for the first time in Polygonum by Strasburger.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341873
Statement A : Integuments encircle the nucellus except at the tip where a large opening called the micropyle is present. Statement B : Opposite the micropylar end, is the nucellus, representing the basal part of the ovule.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Integuments encircle the nucellus except at the tip where a small opening called the micropyle. Opposite the micropylar end, is the chalaza, representing the basal part of the ovule.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341874
Eight nucleate embryo sacs are
1 Always monosporic
2 Always bisporic
3 Always tetrasporic
4 Sometimes monosporic, sometimes bisporic and sometimes tetrasporic
Explanation:
In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac). This method of embryo sac formation from a single megaspore is termed monosporic development.
341872
Assertion : 7-celled, 8 nucleate and monosporic embryo sac is called Polygonum type of embryo sac. Reason : It was discovered by Hofmeister for the first time in Polygonum.
1 Both Assertion and Reason are true and Reason is correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
Explanation:
Embryo sac is the female gametophyte of angiosperms. It was observed by Hofmeister first time. Polygonum type of embryo sac is most simple, most primitive and normal, type of embryo sac. It is 7 celled, 8 -nucleate and monosporic embryo sac. It was discovered for the first time in Polygonum by Strasburger.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341873
Statement A : Integuments encircle the nucellus except at the tip where a large opening called the micropyle is present. Statement B : Opposite the micropylar end, is the nucellus, representing the basal part of the ovule.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Integuments encircle the nucellus except at the tip where a small opening called the micropyle. Opposite the micropylar end, is the chalaza, representing the basal part of the ovule.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341874
Eight nucleate embryo sacs are
1 Always monosporic
2 Always bisporic
3 Always tetrasporic
4 Sometimes monosporic, sometimes bisporic and sometimes tetrasporic
Explanation:
In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac). This method of embryo sac formation from a single megaspore is termed monosporic development.
341872
Assertion : 7-celled, 8 nucleate and monosporic embryo sac is called Polygonum type of embryo sac. Reason : It was discovered by Hofmeister for the first time in Polygonum.
1 Both Assertion and Reason are true and Reason is correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
Explanation:
Embryo sac is the female gametophyte of angiosperms. It was observed by Hofmeister first time. Polygonum type of embryo sac is most simple, most primitive and normal, type of embryo sac. It is 7 celled, 8 -nucleate and monosporic embryo sac. It was discovered for the first time in Polygonum by Strasburger.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341873
Statement A : Integuments encircle the nucellus except at the tip where a large opening called the micropyle is present. Statement B : Opposite the micropylar end, is the nucellus, representing the basal part of the ovule.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Integuments encircle the nucellus except at the tip where a small opening called the micropyle. Opposite the micropylar end, is the chalaza, representing the basal part of the ovule.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341874
Eight nucleate embryo sacs are
1 Always monosporic
2 Always bisporic
3 Always tetrasporic
4 Sometimes monosporic, sometimes bisporic and sometimes tetrasporic
Explanation:
In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac). This method of embryo sac formation from a single megaspore is termed monosporic development.
341872
Assertion : 7-celled, 8 nucleate and monosporic embryo sac is called Polygonum type of embryo sac. Reason : It was discovered by Hofmeister for the first time in Polygonum.
1 Both Assertion and Reason are true and Reason is correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
Explanation:
Embryo sac is the female gametophyte of angiosperms. It was observed by Hofmeister first time. Polygonum type of embryo sac is most simple, most primitive and normal, type of embryo sac. It is 7 celled, 8 -nucleate and monosporic embryo sac. It was discovered for the first time in Polygonum by Strasburger.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341873
Statement A : Integuments encircle the nucellus except at the tip where a large opening called the micropyle is present. Statement B : Opposite the micropylar end, is the nucellus, representing the basal part of the ovule.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Integuments encircle the nucellus except at the tip where a small opening called the micropyle. Opposite the micropylar end, is the chalaza, representing the basal part of the ovule.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341874
Eight nucleate embryo sacs are
1 Always monosporic
2 Always bisporic
3 Always tetrasporic
4 Sometimes monosporic, sometimes bisporic and sometimes tetrasporic
Explanation:
In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac). This method of embryo sac formation from a single megaspore is termed monosporic development.
