262542
Which one of the following is surrounded by a callose wall?
1 Pollen grain
2 Male gamete
3 Microspore mother cell
4 Egg
Explanation:
Exp. B Microspore mother cell is surrounded by callose wall. Primary sporogenous cells gives rise to microspore mother cells. Each microspore mother cell on reduction division gives rise to four microspores or pollen and this formation of microspores or pollens is called microsporogenesis.
AIPMT-2007
Sexual Reproduction in Flowering Plants
262543
Male gametes in angiosperms are formed by the division of:
1 Microspore mother cell
2 Microspore
3 Generative cell
4 Vegetative cell
Explanation:
Pollen grains are produced within the anther of the flower. Pollen mother cell originate from the sporogenous tissue of the anther which later dived meiotically to from four pollen grains called tetrad. Each pollen grain contains vegetative (nonreproductive) cells and a generative cell (reproductive cell). In flowering plants the vegetative cell produce the pollen tube and the generative cell divides to form the two sperm cell or male gametes.
AIPMT-2007
Sexual Reproduction in Flowering Plants
262544
Rarely among angiosperms, the pollen grains influenced the endosperm. This is called as
1 xenia
2 nemec phenomenon
3 meta xenia
4 mesogamy
Explanation:
Exp. C Xenia, term coined by Focke (1881). The direct or indirect effect of forgen pollen grains on the character of endosperm is called the xenia.
JIPMER-2014
Sexual Reproduction in Flowering Plants
262545
Arrange the sequence of events in microsporgenesis.
1 A, B, D, C
2 B, C, D, A
3 C, D, B, A
4 A, B, C, D
Explanation:
Microsporgenesis- when the anther develops, each cell of sporogenous tissue functions as microspore another cell (MMC) or pollen mother cell (PMC) and undergoes is meiotic divisions to form microspore tetrads. The process of formation of microspores from a pollen mother cell (PMC) through meiosis is called microsporogenesis. Sequence of events in microsporgenesis- Pollen mother cell undergoes meiotic division \(\rightarrow\) Microspore tetrad \(\rightarrow\) Anther maturation and dehydration \(\rightarrow\) Disassociation of microspore as pollen grains.
TS EAMCET-09.08.2021 Shift-II
Sexual Reproduction in Flowering Plants
262546
Which of the following cells during gametogenesis is normally diploid?
1 Spermatid
2 Spermatogonia
3 Secondary polar body
4 Primary polar body
Explanation:
Spermatogonia are the diploid stem cells in spermatogenesis (gametogenesis). Spermatognoia are undifferentiated immature germ cells that divide to produce primary spermatocyte. Spermatogensis is the process by which haploid spermatozoa develops from germ cells in the seminiferous tubules of the testis.
262542
Which one of the following is surrounded by a callose wall?
1 Pollen grain
2 Male gamete
3 Microspore mother cell
4 Egg
Explanation:
Exp. B Microspore mother cell is surrounded by callose wall. Primary sporogenous cells gives rise to microspore mother cells. Each microspore mother cell on reduction division gives rise to four microspores or pollen and this formation of microspores or pollens is called microsporogenesis.
AIPMT-2007
Sexual Reproduction in Flowering Plants
262543
Male gametes in angiosperms are formed by the division of:
1 Microspore mother cell
2 Microspore
3 Generative cell
4 Vegetative cell
Explanation:
Pollen grains are produced within the anther of the flower. Pollen mother cell originate from the sporogenous tissue of the anther which later dived meiotically to from four pollen grains called tetrad. Each pollen grain contains vegetative (nonreproductive) cells and a generative cell (reproductive cell). In flowering plants the vegetative cell produce the pollen tube and the generative cell divides to form the two sperm cell or male gametes.
AIPMT-2007
Sexual Reproduction in Flowering Plants
262544
Rarely among angiosperms, the pollen grains influenced the endosperm. This is called as
1 xenia
2 nemec phenomenon
3 meta xenia
4 mesogamy
Explanation:
Exp. C Xenia, term coined by Focke (1881). The direct or indirect effect of forgen pollen grains on the character of endosperm is called the xenia.
JIPMER-2014
Sexual Reproduction in Flowering Plants
262545
Arrange the sequence of events in microsporgenesis.
1 A, B, D, C
2 B, C, D, A
3 C, D, B, A
4 A, B, C, D
Explanation:
Microsporgenesis- when the anther develops, each cell of sporogenous tissue functions as microspore another cell (MMC) or pollen mother cell (PMC) and undergoes is meiotic divisions to form microspore tetrads. The process of formation of microspores from a pollen mother cell (PMC) through meiosis is called microsporogenesis. Sequence of events in microsporgenesis- Pollen mother cell undergoes meiotic division \(\rightarrow\) Microspore tetrad \(\rightarrow\) Anther maturation and dehydration \(\rightarrow\) Disassociation of microspore as pollen grains.
TS EAMCET-09.08.2021 Shift-II
Sexual Reproduction in Flowering Plants
262546
Which of the following cells during gametogenesis is normally diploid?
1 Spermatid
2 Spermatogonia
3 Secondary polar body
4 Primary polar body
Explanation:
Spermatogonia are the diploid stem cells in spermatogenesis (gametogenesis). Spermatognoia are undifferentiated immature germ cells that divide to produce primary spermatocyte. Spermatogensis is the process by which haploid spermatozoa develops from germ cells in the seminiferous tubules of the testis.
262542
Which one of the following is surrounded by a callose wall?
1 Pollen grain
2 Male gamete
3 Microspore mother cell
4 Egg
Explanation:
Exp. B Microspore mother cell is surrounded by callose wall. Primary sporogenous cells gives rise to microspore mother cells. Each microspore mother cell on reduction division gives rise to four microspores or pollen and this formation of microspores or pollens is called microsporogenesis.
AIPMT-2007
Sexual Reproduction in Flowering Plants
262543
Male gametes in angiosperms are formed by the division of:
1 Microspore mother cell
2 Microspore
3 Generative cell
4 Vegetative cell
Explanation:
Pollen grains are produced within the anther of the flower. Pollen mother cell originate from the sporogenous tissue of the anther which later dived meiotically to from four pollen grains called tetrad. Each pollen grain contains vegetative (nonreproductive) cells and a generative cell (reproductive cell). In flowering plants the vegetative cell produce the pollen tube and the generative cell divides to form the two sperm cell or male gametes.
AIPMT-2007
Sexual Reproduction in Flowering Plants
262544
Rarely among angiosperms, the pollen grains influenced the endosperm. This is called as
1 xenia
2 nemec phenomenon
3 meta xenia
4 mesogamy
Explanation:
Exp. C Xenia, term coined by Focke (1881). The direct or indirect effect of forgen pollen grains on the character of endosperm is called the xenia.
JIPMER-2014
Sexual Reproduction in Flowering Plants
262545
Arrange the sequence of events in microsporgenesis.
1 A, B, D, C
2 B, C, D, A
3 C, D, B, A
4 A, B, C, D
Explanation:
Microsporgenesis- when the anther develops, each cell of sporogenous tissue functions as microspore another cell (MMC) or pollen mother cell (PMC) and undergoes is meiotic divisions to form microspore tetrads. The process of formation of microspores from a pollen mother cell (PMC) through meiosis is called microsporogenesis. Sequence of events in microsporgenesis- Pollen mother cell undergoes meiotic division \(\rightarrow\) Microspore tetrad \(\rightarrow\) Anther maturation and dehydration \(\rightarrow\) Disassociation of microspore as pollen grains.
TS EAMCET-09.08.2021 Shift-II
Sexual Reproduction in Flowering Plants
262546
Which of the following cells during gametogenesis is normally diploid?
1 Spermatid
2 Spermatogonia
3 Secondary polar body
4 Primary polar body
Explanation:
Spermatogonia are the diploid stem cells in spermatogenesis (gametogenesis). Spermatognoia are undifferentiated immature germ cells that divide to produce primary spermatocyte. Spermatogensis is the process by which haploid spermatozoa develops from germ cells in the seminiferous tubules of the testis.
262542
Which one of the following is surrounded by a callose wall?
1 Pollen grain
2 Male gamete
3 Microspore mother cell
4 Egg
Explanation:
Exp. B Microspore mother cell is surrounded by callose wall. Primary sporogenous cells gives rise to microspore mother cells. Each microspore mother cell on reduction division gives rise to four microspores or pollen and this formation of microspores or pollens is called microsporogenesis.
AIPMT-2007
Sexual Reproduction in Flowering Plants
262543
Male gametes in angiosperms are formed by the division of:
1 Microspore mother cell
2 Microspore
3 Generative cell
4 Vegetative cell
Explanation:
Pollen grains are produced within the anther of the flower. Pollen mother cell originate from the sporogenous tissue of the anther which later dived meiotically to from four pollen grains called tetrad. Each pollen grain contains vegetative (nonreproductive) cells and a generative cell (reproductive cell). In flowering plants the vegetative cell produce the pollen tube and the generative cell divides to form the two sperm cell or male gametes.
AIPMT-2007
Sexual Reproduction in Flowering Plants
262544
Rarely among angiosperms, the pollen grains influenced the endosperm. This is called as
1 xenia
2 nemec phenomenon
3 meta xenia
4 mesogamy
Explanation:
Exp. C Xenia, term coined by Focke (1881). The direct or indirect effect of forgen pollen grains on the character of endosperm is called the xenia.
JIPMER-2014
Sexual Reproduction in Flowering Plants
262545
Arrange the sequence of events in microsporgenesis.
1 A, B, D, C
2 B, C, D, A
3 C, D, B, A
4 A, B, C, D
Explanation:
Microsporgenesis- when the anther develops, each cell of sporogenous tissue functions as microspore another cell (MMC) or pollen mother cell (PMC) and undergoes is meiotic divisions to form microspore tetrads. The process of formation of microspores from a pollen mother cell (PMC) through meiosis is called microsporogenesis. Sequence of events in microsporgenesis- Pollen mother cell undergoes meiotic division \(\rightarrow\) Microspore tetrad \(\rightarrow\) Anther maturation and dehydration \(\rightarrow\) Disassociation of microspore as pollen grains.
TS EAMCET-09.08.2021 Shift-II
Sexual Reproduction in Flowering Plants
262546
Which of the following cells during gametogenesis is normally diploid?
1 Spermatid
2 Spermatogonia
3 Secondary polar body
4 Primary polar body
Explanation:
Spermatogonia are the diploid stem cells in spermatogenesis (gametogenesis). Spermatognoia are undifferentiated immature germ cells that divide to produce primary spermatocyte. Spermatogensis is the process by which haploid spermatozoa develops from germ cells in the seminiferous tubules of the testis.
262542
Which one of the following is surrounded by a callose wall?
1 Pollen grain
2 Male gamete
3 Microspore mother cell
4 Egg
Explanation:
Exp. B Microspore mother cell is surrounded by callose wall. Primary sporogenous cells gives rise to microspore mother cells. Each microspore mother cell on reduction division gives rise to four microspores or pollen and this formation of microspores or pollens is called microsporogenesis.
AIPMT-2007
Sexual Reproduction in Flowering Plants
262543
Male gametes in angiosperms are formed by the division of:
1 Microspore mother cell
2 Microspore
3 Generative cell
4 Vegetative cell
Explanation:
Pollen grains are produced within the anther of the flower. Pollen mother cell originate from the sporogenous tissue of the anther which later dived meiotically to from four pollen grains called tetrad. Each pollen grain contains vegetative (nonreproductive) cells and a generative cell (reproductive cell). In flowering plants the vegetative cell produce the pollen tube and the generative cell divides to form the two sperm cell or male gametes.
AIPMT-2007
Sexual Reproduction in Flowering Plants
262544
Rarely among angiosperms, the pollen grains influenced the endosperm. This is called as
1 xenia
2 nemec phenomenon
3 meta xenia
4 mesogamy
Explanation:
Exp. C Xenia, term coined by Focke (1881). The direct or indirect effect of forgen pollen grains on the character of endosperm is called the xenia.
JIPMER-2014
Sexual Reproduction in Flowering Plants
262545
Arrange the sequence of events in microsporgenesis.
1 A, B, D, C
2 B, C, D, A
3 C, D, B, A
4 A, B, C, D
Explanation:
Microsporgenesis- when the anther develops, each cell of sporogenous tissue functions as microspore another cell (MMC) or pollen mother cell (PMC) and undergoes is meiotic divisions to form microspore tetrads. The process of formation of microspores from a pollen mother cell (PMC) through meiosis is called microsporogenesis. Sequence of events in microsporgenesis- Pollen mother cell undergoes meiotic division \(\rightarrow\) Microspore tetrad \(\rightarrow\) Anther maturation and dehydration \(\rightarrow\) Disassociation of microspore as pollen grains.
TS EAMCET-09.08.2021 Shift-II
Sexual Reproduction in Flowering Plants
262546
Which of the following cells during gametogenesis is normally diploid?
1 Spermatid
2 Spermatogonia
3 Secondary polar body
4 Primary polar body
Explanation:
Spermatogonia are the diploid stem cells in spermatogenesis (gametogenesis). Spermatognoia are undifferentiated immature germ cells that divide to produce primary spermatocyte. Spermatogensis is the process by which haploid spermatozoa develops from germ cells in the seminiferous tubules of the testis.
