262611 In the given diagram, parts labelled as \(\mathrm{A}, \mathrm{B}, \mathrm{C}\), \(D, E\) and \(F\) are respectively indentified as
1 synergids, polar nuclei, central cell, antipodals, filiform apparatus and egg
2 polar nuclei, egg, antipodals, central cell, filiform apparatus and synergids
3 egg, synergids, central cell, filiform apparatus, antipodals and polar nuclei
4 central cell, polar nuclei filiform apparatus, antipodals, synergids and egg
Explanation:
Megaspore is the mother cell for the development of female gametophyte. The given diagram is a mature angiospermic embryo sac in which (A) indicate synergies (B) indicate polar nuclei (C) indicate central cell (D) indicate antipodal (E) indicate filiform apparatus (F) indicate egg.
JIPMER-2014
Sexual Reproduction in Flowering Plants
262614
Identify the correct statement from the following:
1 A, B, C only
2 A, B, D only
3 B, D, E only
4 C, D, E only
5 In rice pollen grains are viable for months. The correct answer is :
Explanation:
Exp. A (A) In Loranthus, ovule is not covered by any integuments. (B) In sunflower, single ovule is seen in the ovary. (C) Pollen banks store selected pollen at \(-196^{\circ} \mathrm{C}\) (D) In Hibicus anther is monothecous. (E) In rice pollen grains are viable for only 30 minutes.
TS EAMCET-30.07.2022 Shift-II
Sexual Reproduction in Flowering Plants
262618
In general the egg apparatus of embryo sac in angiosperm consists of:
1 One egg cell, two synergids, three antipodal cells, two Polar nuclei
2 One egg cell, two synergids, two antipodal cells, three Polar nuclei
3 One egg cell, three synergids, two antipodal cells, two Polar nuclei
4 One egg cell, two synergids, two antipodal cells, two Polar nuclei
Explanation:
Exp. A - Antipodal cells are the three haploid cells in the mature embryo sac of flowering plants that are situated at the opposite end to the micropyle. - Function of antipodal cell of embryo to provide nutrition to the whole gametophyte. - Two specialized cells that lie adjacent to the egg cell of embryo sac called synergid. It play a essential role in pollen tube guidance \& function. - A filiform apparatus is a group of finger-like projections of synergid. - The structure of the mature embryo sac consists of 8 nucleated and 7 celled structures. Comprises One egg cell, two synergids, three antipodal cells, two Polar nuclei
NEET (Re-Exam)-04.09.2022
Sexual Reproduction in Flowering Plants
262633
Select the correct diagram
1 1
2 2
3 3
4 4
Explanation:
The nucleus of the functional megaspore divides mitotically to form two nuclei which move to the opposite poles, forming the 2-nucleate embryo sac. Two more sequential mitotic nuclear divisions result in the formation of the 4-nucleate and later the 8-nucleate states of the embryo sac. It is of interest to note that these mitotic divisions are strictly free nuclear, that is, nuclear divisions are not followed immediately by cell wall formation. After the 8-nucleate stage, cell walls are laid down leading to the organization of the typical female gametophyte or embryo sac.
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Sexual Reproduction in Flowering Plants
262611 In the given diagram, parts labelled as \(\mathrm{A}, \mathrm{B}, \mathrm{C}\), \(D, E\) and \(F\) are respectively indentified as
1 synergids, polar nuclei, central cell, antipodals, filiform apparatus and egg
2 polar nuclei, egg, antipodals, central cell, filiform apparatus and synergids
3 egg, synergids, central cell, filiform apparatus, antipodals and polar nuclei
4 central cell, polar nuclei filiform apparatus, antipodals, synergids and egg
Explanation:
Megaspore is the mother cell for the development of female gametophyte. The given diagram is a mature angiospermic embryo sac in which (A) indicate synergies (B) indicate polar nuclei (C) indicate central cell (D) indicate antipodal (E) indicate filiform apparatus (F) indicate egg.
JIPMER-2014
Sexual Reproduction in Flowering Plants
262614
Identify the correct statement from the following:
1 A, B, C only
2 A, B, D only
3 B, D, E only
4 C, D, E only
5 In rice pollen grains are viable for months. The correct answer is :
Explanation:
Exp. A (A) In Loranthus, ovule is not covered by any integuments. (B) In sunflower, single ovule is seen in the ovary. (C) Pollen banks store selected pollen at \(-196^{\circ} \mathrm{C}\) (D) In Hibicus anther is monothecous. (E) In rice pollen grains are viable for only 30 minutes.
TS EAMCET-30.07.2022 Shift-II
Sexual Reproduction in Flowering Plants
262618
In general the egg apparatus of embryo sac in angiosperm consists of:
1 One egg cell, two synergids, three antipodal cells, two Polar nuclei
2 One egg cell, two synergids, two antipodal cells, three Polar nuclei
3 One egg cell, three synergids, two antipodal cells, two Polar nuclei
4 One egg cell, two synergids, two antipodal cells, two Polar nuclei
Explanation:
Exp. A - Antipodal cells are the three haploid cells in the mature embryo sac of flowering plants that are situated at the opposite end to the micropyle. - Function of antipodal cell of embryo to provide nutrition to the whole gametophyte. - Two specialized cells that lie adjacent to the egg cell of embryo sac called synergid. It play a essential role in pollen tube guidance \& function. - A filiform apparatus is a group of finger-like projections of synergid. - The structure of the mature embryo sac consists of 8 nucleated and 7 celled structures. Comprises One egg cell, two synergids, three antipodal cells, two Polar nuclei
NEET (Re-Exam)-04.09.2022
Sexual Reproduction in Flowering Plants
262633
Select the correct diagram
1 1
2 2
3 3
4 4
Explanation:
The nucleus of the functional megaspore divides mitotically to form two nuclei which move to the opposite poles, forming the 2-nucleate embryo sac. Two more sequential mitotic nuclear divisions result in the formation of the 4-nucleate and later the 8-nucleate states of the embryo sac. It is of interest to note that these mitotic divisions are strictly free nuclear, that is, nuclear divisions are not followed immediately by cell wall formation. After the 8-nucleate stage, cell walls are laid down leading to the organization of the typical female gametophyte or embryo sac.
262611 In the given diagram, parts labelled as \(\mathrm{A}, \mathrm{B}, \mathrm{C}\), \(D, E\) and \(F\) are respectively indentified as
1 synergids, polar nuclei, central cell, antipodals, filiform apparatus and egg
2 polar nuclei, egg, antipodals, central cell, filiform apparatus and synergids
3 egg, synergids, central cell, filiform apparatus, antipodals and polar nuclei
4 central cell, polar nuclei filiform apparatus, antipodals, synergids and egg
Explanation:
Megaspore is the mother cell for the development of female gametophyte. The given diagram is a mature angiospermic embryo sac in which (A) indicate synergies (B) indicate polar nuclei (C) indicate central cell (D) indicate antipodal (E) indicate filiform apparatus (F) indicate egg.
JIPMER-2014
Sexual Reproduction in Flowering Plants
262614
Identify the correct statement from the following:
1 A, B, C only
2 A, B, D only
3 B, D, E only
4 C, D, E only
5 In rice pollen grains are viable for months. The correct answer is :
Explanation:
Exp. A (A) In Loranthus, ovule is not covered by any integuments. (B) In sunflower, single ovule is seen in the ovary. (C) Pollen banks store selected pollen at \(-196^{\circ} \mathrm{C}\) (D) In Hibicus anther is monothecous. (E) In rice pollen grains are viable for only 30 minutes.
TS EAMCET-30.07.2022 Shift-II
Sexual Reproduction in Flowering Plants
262618
In general the egg apparatus of embryo sac in angiosperm consists of:
1 One egg cell, two synergids, three antipodal cells, two Polar nuclei
2 One egg cell, two synergids, two antipodal cells, three Polar nuclei
3 One egg cell, three synergids, two antipodal cells, two Polar nuclei
4 One egg cell, two synergids, two antipodal cells, two Polar nuclei
Explanation:
Exp. A - Antipodal cells are the three haploid cells in the mature embryo sac of flowering plants that are situated at the opposite end to the micropyle. - Function of antipodal cell of embryo to provide nutrition to the whole gametophyte. - Two specialized cells that lie adjacent to the egg cell of embryo sac called synergid. It play a essential role in pollen tube guidance \& function. - A filiform apparatus is a group of finger-like projections of synergid. - The structure of the mature embryo sac consists of 8 nucleated and 7 celled structures. Comprises One egg cell, two synergids, three antipodal cells, two Polar nuclei
NEET (Re-Exam)-04.09.2022
Sexual Reproduction in Flowering Plants
262633
Select the correct diagram
1 1
2 2
3 3
4 4
Explanation:
The nucleus of the functional megaspore divides mitotically to form two nuclei which move to the opposite poles, forming the 2-nucleate embryo sac. Two more sequential mitotic nuclear divisions result in the formation of the 4-nucleate and later the 8-nucleate states of the embryo sac. It is of interest to note that these mitotic divisions are strictly free nuclear, that is, nuclear divisions are not followed immediately by cell wall formation. After the 8-nucleate stage, cell walls are laid down leading to the organization of the typical female gametophyte or embryo sac.
262611 In the given diagram, parts labelled as \(\mathrm{A}, \mathrm{B}, \mathrm{C}\), \(D, E\) and \(F\) are respectively indentified as
1 synergids, polar nuclei, central cell, antipodals, filiform apparatus and egg
2 polar nuclei, egg, antipodals, central cell, filiform apparatus and synergids
3 egg, synergids, central cell, filiform apparatus, antipodals and polar nuclei
4 central cell, polar nuclei filiform apparatus, antipodals, synergids and egg
Explanation:
Megaspore is the mother cell for the development of female gametophyte. The given diagram is a mature angiospermic embryo sac in which (A) indicate synergies (B) indicate polar nuclei (C) indicate central cell (D) indicate antipodal (E) indicate filiform apparatus (F) indicate egg.
JIPMER-2014
Sexual Reproduction in Flowering Plants
262614
Identify the correct statement from the following:
1 A, B, C only
2 A, B, D only
3 B, D, E only
4 C, D, E only
5 In rice pollen grains are viable for months. The correct answer is :
Explanation:
Exp. A (A) In Loranthus, ovule is not covered by any integuments. (B) In sunflower, single ovule is seen in the ovary. (C) Pollen banks store selected pollen at \(-196^{\circ} \mathrm{C}\) (D) In Hibicus anther is monothecous. (E) In rice pollen grains are viable for only 30 minutes.
TS EAMCET-30.07.2022 Shift-II
Sexual Reproduction in Flowering Plants
262618
In general the egg apparatus of embryo sac in angiosperm consists of:
1 One egg cell, two synergids, three antipodal cells, two Polar nuclei
2 One egg cell, two synergids, two antipodal cells, three Polar nuclei
3 One egg cell, three synergids, two antipodal cells, two Polar nuclei
4 One egg cell, two synergids, two antipodal cells, two Polar nuclei
Explanation:
Exp. A - Antipodal cells are the three haploid cells in the mature embryo sac of flowering plants that are situated at the opposite end to the micropyle. - Function of antipodal cell of embryo to provide nutrition to the whole gametophyte. - Two specialized cells that lie adjacent to the egg cell of embryo sac called synergid. It play a essential role in pollen tube guidance \& function. - A filiform apparatus is a group of finger-like projections of synergid. - The structure of the mature embryo sac consists of 8 nucleated and 7 celled structures. Comprises One egg cell, two synergids, three antipodal cells, two Polar nuclei
NEET (Re-Exam)-04.09.2022
Sexual Reproduction in Flowering Plants
262633
Select the correct diagram
1 1
2 2
3 3
4 4
Explanation:
The nucleus of the functional megaspore divides mitotically to form two nuclei which move to the opposite poles, forming the 2-nucleate embryo sac. Two more sequential mitotic nuclear divisions result in the formation of the 4-nucleate and later the 8-nucleate states of the embryo sac. It is of interest to note that these mitotic divisions are strictly free nuclear, that is, nuclear divisions are not followed immediately by cell wall formation. After the 8-nucleate stage, cell walls are laid down leading to the organization of the typical female gametophyte or embryo sac.
