Filliform apparatus is found in synergids. It is a group of finger-like structures attached to the upper wall of synergid. It guides the pollen tube. Synergids are present at micropylar end of ovule. Antipodal cells are present at chalazal end of ovule. Anther is male reproductive part of flower. Tapetum is innermost layer of pollen sac which provide nutrition to developing pollen grains.
AFMC-2002
Sexual Reproduction in Flowering Plants
262575
Outer wall of pollen grain is made up of
1 Cellulose
2 Sporopollenin
3 Peclocellulose
4 Lignin
Explanation:
Exine of pollen grains are made up of sporopollenin. Spropollenin is the most resistant known biological material. Pollen grains is male gamete with two layered cell wall. Outer covering is tough called exine and inner covering is intine. Pectocellulose is formed by the fusion of pectin and cellulose fibres. It is present in intine. Pollen kit is the oily and sticky layer around the exine of pollen grains.
2009
Sexual Reproduction in Flowering Plants
262584
In Clerodendron the self-pollination is prevented by:
1 protogyny
2 herkogamy
3 protandry
4 heterostyly
Explanation:
Exp. B In Clerodendron, the self-pollination is prevented by protandry. In protandry, anthers mature before pistil. In protogyny, pistil matures before anther. Ex.- pearl millet. In heterostyly, style and filaments of the anther are of different heights. Herkogany is the spatial separation of anthers \& stigma within flowers.
AP EAMCET-2001
Sexual Reproduction in Flowering Plants
262587
The growth of pollen tube towards embryo sac is
1 Geotropism
2 Chemotaxis
3 Thigmotaxis
4 Phototaxis
Explanation:
The growth of pollen tube towards embryo sac is chemotaxis. The movement of an organism in response to chemical stimulation is called chemotaxis. The movement of living things towards or away from a light source is known as phototaxis. Chemotaxis is induced by a specific substance, the chemoattractant. This substance can be a chemokine, a chemokine receptor, a growth factor or a growth factor receptor.
Filliform apparatus is found in synergids. It is a group of finger-like structures attached to the upper wall of synergid. It guides the pollen tube. Synergids are present at micropylar end of ovule. Antipodal cells are present at chalazal end of ovule. Anther is male reproductive part of flower. Tapetum is innermost layer of pollen sac which provide nutrition to developing pollen grains.
AFMC-2002
Sexual Reproduction in Flowering Plants
262575
Outer wall of pollen grain is made up of
1 Cellulose
2 Sporopollenin
3 Peclocellulose
4 Lignin
Explanation:
Exine of pollen grains are made up of sporopollenin. Spropollenin is the most resistant known biological material. Pollen grains is male gamete with two layered cell wall. Outer covering is tough called exine and inner covering is intine. Pectocellulose is formed by the fusion of pectin and cellulose fibres. It is present in intine. Pollen kit is the oily and sticky layer around the exine of pollen grains.
2009
Sexual Reproduction in Flowering Plants
262584
In Clerodendron the self-pollination is prevented by:
1 protogyny
2 herkogamy
3 protandry
4 heterostyly
Explanation:
Exp. B In Clerodendron, the self-pollination is prevented by protandry. In protandry, anthers mature before pistil. In protogyny, pistil matures before anther. Ex.- pearl millet. In heterostyly, style and filaments of the anther are of different heights. Herkogany is the spatial separation of anthers \& stigma within flowers.
AP EAMCET-2001
Sexual Reproduction in Flowering Plants
262587
The growth of pollen tube towards embryo sac is
1 Geotropism
2 Chemotaxis
3 Thigmotaxis
4 Phototaxis
Explanation:
The growth of pollen tube towards embryo sac is chemotaxis. The movement of an organism in response to chemical stimulation is called chemotaxis. The movement of living things towards or away from a light source is known as phototaxis. Chemotaxis is induced by a specific substance, the chemoattractant. This substance can be a chemokine, a chemokine receptor, a growth factor or a growth factor receptor.
Filliform apparatus is found in synergids. It is a group of finger-like structures attached to the upper wall of synergid. It guides the pollen tube. Synergids are present at micropylar end of ovule. Antipodal cells are present at chalazal end of ovule. Anther is male reproductive part of flower. Tapetum is innermost layer of pollen sac which provide nutrition to developing pollen grains.
AFMC-2002
Sexual Reproduction in Flowering Plants
262575
Outer wall of pollen grain is made up of
1 Cellulose
2 Sporopollenin
3 Peclocellulose
4 Lignin
Explanation:
Exine of pollen grains are made up of sporopollenin. Spropollenin is the most resistant known biological material. Pollen grains is male gamete with two layered cell wall. Outer covering is tough called exine and inner covering is intine. Pectocellulose is formed by the fusion of pectin and cellulose fibres. It is present in intine. Pollen kit is the oily and sticky layer around the exine of pollen grains.
2009
Sexual Reproduction in Flowering Plants
262584
In Clerodendron the self-pollination is prevented by:
1 protogyny
2 herkogamy
3 protandry
4 heterostyly
Explanation:
Exp. B In Clerodendron, the self-pollination is prevented by protandry. In protandry, anthers mature before pistil. In protogyny, pistil matures before anther. Ex.- pearl millet. In heterostyly, style and filaments of the anther are of different heights. Herkogany is the spatial separation of anthers \& stigma within flowers.
AP EAMCET-2001
Sexual Reproduction in Flowering Plants
262587
The growth of pollen tube towards embryo sac is
1 Geotropism
2 Chemotaxis
3 Thigmotaxis
4 Phototaxis
Explanation:
The growth of pollen tube towards embryo sac is chemotaxis. The movement of an organism in response to chemical stimulation is called chemotaxis. The movement of living things towards or away from a light source is known as phototaxis. Chemotaxis is induced by a specific substance, the chemoattractant. This substance can be a chemokine, a chemokine receptor, a growth factor or a growth factor receptor.
Filliform apparatus is found in synergids. It is a group of finger-like structures attached to the upper wall of synergid. It guides the pollen tube. Synergids are present at micropylar end of ovule. Antipodal cells are present at chalazal end of ovule. Anther is male reproductive part of flower. Tapetum is innermost layer of pollen sac which provide nutrition to developing pollen grains.
AFMC-2002
Sexual Reproduction in Flowering Plants
262575
Outer wall of pollen grain is made up of
1 Cellulose
2 Sporopollenin
3 Peclocellulose
4 Lignin
Explanation:
Exine of pollen grains are made up of sporopollenin. Spropollenin is the most resistant known biological material. Pollen grains is male gamete with two layered cell wall. Outer covering is tough called exine and inner covering is intine. Pectocellulose is formed by the fusion of pectin and cellulose fibres. It is present in intine. Pollen kit is the oily and sticky layer around the exine of pollen grains.
2009
Sexual Reproduction in Flowering Plants
262584
In Clerodendron the self-pollination is prevented by:
1 protogyny
2 herkogamy
3 protandry
4 heterostyly
Explanation:
Exp. B In Clerodendron, the self-pollination is prevented by protandry. In protandry, anthers mature before pistil. In protogyny, pistil matures before anther. Ex.- pearl millet. In heterostyly, style and filaments of the anther are of different heights. Herkogany is the spatial separation of anthers \& stigma within flowers.
AP EAMCET-2001
Sexual Reproduction in Flowering Plants
262587
The growth of pollen tube towards embryo sac is
1 Geotropism
2 Chemotaxis
3 Thigmotaxis
4 Phototaxis
Explanation:
The growth of pollen tube towards embryo sac is chemotaxis. The movement of an organism in response to chemical stimulation is called chemotaxis. The movement of living things towards or away from a light source is known as phototaxis. Chemotaxis is induced by a specific substance, the chemoattractant. This substance can be a chemokine, a chemokine receptor, a growth factor or a growth factor receptor.
