341936
Sporopollenin, a chemical substance is found in:
1 Exine of pollen grain
2 Intine of pollen grain
3 Tapetum of anther
4 Endothecium of anther
Explanation:
Sporopollenin is one of the most chemically inert biological polymers. It is a major component of the touch outer (exine) walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments.
KCET - 2010
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341937
Statement A : As the anther develops, the cells of the sporogenous tissue undergo mitotic divisions to form megaspore tetrads. Statement B : The pollen grains represent the male gametophytes.
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:
As the anther develops, the cells of the sporogenous tissue undergo meiotic divisions to form microspore tetrads.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341938
In angiosperms, microsporogenesis and megasporogenesis :
1 Occur in ovule
2 Occur in anther
3 Form gametes without further divisions
4 Involve meiosis
Explanation:
In angiosperms, microsporogenesis and megasporogenis involve meiosis.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341939
Exine of pollen grain is formed of
1 Callose
2 Pecto-cellulose
3 Ligno-cellulose
4 Sporopollenin
Explanation:
Exine is tough, cutinized layer often with spinous outgrowth but sometimes smooth. Exine is composed of sporopollenin which is resistant to physical and biological decomposition. It protect the pollens from environmental extremes.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341940
The intine of a pollen grain is mainly made up of
1 Cellulose and pectin
2 Lipid and pectin
3 Pectin and lignin
4 Lignin and cutin
Explanation:
The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin.
341936
Sporopollenin, a chemical substance is found in:
1 Exine of pollen grain
2 Intine of pollen grain
3 Tapetum of anther
4 Endothecium of anther
Explanation:
Sporopollenin is one of the most chemically inert biological polymers. It is a major component of the touch outer (exine) walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments.
KCET - 2010
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341937
Statement A : As the anther develops, the cells of the sporogenous tissue undergo mitotic divisions to form megaspore tetrads. Statement B : The pollen grains represent the male gametophytes.
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:
As the anther develops, the cells of the sporogenous tissue undergo meiotic divisions to form microspore tetrads.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341938
In angiosperms, microsporogenesis and megasporogenesis :
1 Occur in ovule
2 Occur in anther
3 Form gametes without further divisions
4 Involve meiosis
Explanation:
In angiosperms, microsporogenesis and megasporogenis involve meiosis.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341939
Exine of pollen grain is formed of
1 Callose
2 Pecto-cellulose
3 Ligno-cellulose
4 Sporopollenin
Explanation:
Exine is tough, cutinized layer often with spinous outgrowth but sometimes smooth. Exine is composed of sporopollenin which is resistant to physical and biological decomposition. It protect the pollens from environmental extremes.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341940
The intine of a pollen grain is mainly made up of
1 Cellulose and pectin
2 Lipid and pectin
3 Pectin and lignin
4 Lignin and cutin
Explanation:
The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin.
NEET Test Series from KOTA - 10 Papers In MS WORD
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BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341936
Sporopollenin, a chemical substance is found in:
1 Exine of pollen grain
2 Intine of pollen grain
3 Tapetum of anther
4 Endothecium of anther
Explanation:
Sporopollenin is one of the most chemically inert biological polymers. It is a major component of the touch outer (exine) walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments.
KCET - 2010
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341937
Statement A : As the anther develops, the cells of the sporogenous tissue undergo mitotic divisions to form megaspore tetrads. Statement B : The pollen grains represent the male gametophytes.
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:
As the anther develops, the cells of the sporogenous tissue undergo meiotic divisions to form microspore tetrads.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341938
In angiosperms, microsporogenesis and megasporogenesis :
1 Occur in ovule
2 Occur in anther
3 Form gametes without further divisions
4 Involve meiosis
Explanation:
In angiosperms, microsporogenesis and megasporogenis involve meiosis.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341939
Exine of pollen grain is formed of
1 Callose
2 Pecto-cellulose
3 Ligno-cellulose
4 Sporopollenin
Explanation:
Exine is tough, cutinized layer often with spinous outgrowth but sometimes smooth. Exine is composed of sporopollenin which is resistant to physical and biological decomposition. It protect the pollens from environmental extremes.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341940
The intine of a pollen grain is mainly made up of
1 Cellulose and pectin
2 Lipid and pectin
3 Pectin and lignin
4 Lignin and cutin
Explanation:
The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin.
341936
Sporopollenin, a chemical substance is found in:
1 Exine of pollen grain
2 Intine of pollen grain
3 Tapetum of anther
4 Endothecium of anther
Explanation:
Sporopollenin is one of the most chemically inert biological polymers. It is a major component of the touch outer (exine) walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments.
KCET - 2010
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341937
Statement A : As the anther develops, the cells of the sporogenous tissue undergo mitotic divisions to form megaspore tetrads. Statement B : The pollen grains represent the male gametophytes.
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:
As the anther develops, the cells of the sporogenous tissue undergo meiotic divisions to form microspore tetrads.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341938
In angiosperms, microsporogenesis and megasporogenesis :
1 Occur in ovule
2 Occur in anther
3 Form gametes without further divisions
4 Involve meiosis
Explanation:
In angiosperms, microsporogenesis and megasporogenis involve meiosis.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341939
Exine of pollen grain is formed of
1 Callose
2 Pecto-cellulose
3 Ligno-cellulose
4 Sporopollenin
Explanation:
Exine is tough, cutinized layer often with spinous outgrowth but sometimes smooth. Exine is composed of sporopollenin which is resistant to physical and biological decomposition. It protect the pollens from environmental extremes.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341940
The intine of a pollen grain is mainly made up of
1 Cellulose and pectin
2 Lipid and pectin
3 Pectin and lignin
4 Lignin and cutin
Explanation:
The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin.
341936
Sporopollenin, a chemical substance is found in:
1 Exine of pollen grain
2 Intine of pollen grain
3 Tapetum of anther
4 Endothecium of anther
Explanation:
Sporopollenin is one of the most chemically inert biological polymers. It is a major component of the touch outer (exine) walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments.
KCET - 2010
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341937
Statement A : As the anther develops, the cells of the sporogenous tissue undergo mitotic divisions to form megaspore tetrads. Statement B : The pollen grains represent the male gametophytes.
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:
As the anther develops, the cells of the sporogenous tissue undergo meiotic divisions to form microspore tetrads.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341938
In angiosperms, microsporogenesis and megasporogenesis :
1 Occur in ovule
2 Occur in anther
3 Form gametes without further divisions
4 Involve meiosis
Explanation:
In angiosperms, microsporogenesis and megasporogenis involve meiosis.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341939
Exine of pollen grain is formed of
1 Callose
2 Pecto-cellulose
3 Ligno-cellulose
4 Sporopollenin
Explanation:
Exine is tough, cutinized layer often with spinous outgrowth but sometimes smooth. Exine is composed of sporopollenin which is resistant to physical and biological decomposition. It protect the pollens from environmental extremes.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341940
The intine of a pollen grain is mainly made up of
1 Cellulose and pectin
2 Lipid and pectin
3 Pectin and lignin
4 Lignin and cutin
Explanation:
The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin.