259213
Sexual reproduction in Spirogyra is an advanced feature because it shows: -
1 Different size of motile sex organs
2 Same size of motile sex organs
3 Morphologically different sex organs
4 Physiologically differentiated sex organs
Explanation:
Spirogyra is a freshwater green alga which belongs to class chlorophyceae. The sexual reproduction in spirogyra is called conjugation. It involves the fussion of two morphologically indentical but physiologically dissimilar non-ciliated gametes. For development of gametes, some of the cell start to act like male and female gametangia in which the cell contents become separated from the cell wall. Shrink and ultimately forms gametes. The fusion of these gemetes takes place by scalariform conjugation or lateral conjugation.
AIPMT-2003
Plant kingdom
259214
Ulothrix filaments produce
1 heterogametes
2 basidiospores
3 isogametes
4 anisogametes
Explanation:
Ulothrix is member of class chlorophyceae. The member of class chlorophyceae are commonly called green algae. Vegetative reproduction usually takes place by fragmentation or by formation of different types of spores. The Ulothrix sexually reproduces by biflagellate gametes. The isogametes of Ulothrix are biflagellate. Their size is even smaller than micro zoospores.
AIPMT-1997
Plant kingdom
259215
Brown algae is characterised by the presence of
1 fucoxanthin
2 haematochrome
3 phycocyanin
4 phycoerythrin
Explanation:
The members of phaeophyceae (Brown algae) are found primarily in marine habitate. They show great variation in size and form. They possess chlorophyll a,c carotenoids and xanthophylls. They vary in colour from olive green to various shades of brown, depending upon the amount of the xanthophyll pigment, fucoxanthin present in them.
AIPMT-1997
Plant kingdom
259265
Comparable to angiosperms, which of the following algae exhibits diplontic life cycle?
1 Spirogyra
2 Ectocarpus
3 Polysiphonia
4 Fucus
Explanation:
A brown alga known as fucus (rockweed) exhibits a diploid life history that is comparabt to that of angiosperms. Spirogyra, Volvox exhibits haplontic pattern of life cycle whereas Ectocarpus, Polysiphonia \& kelp are haplo-diplontic.
259213
Sexual reproduction in Spirogyra is an advanced feature because it shows: -
1 Different size of motile sex organs
2 Same size of motile sex organs
3 Morphologically different sex organs
4 Physiologically differentiated sex organs
Explanation:
Spirogyra is a freshwater green alga which belongs to class chlorophyceae. The sexual reproduction in spirogyra is called conjugation. It involves the fussion of two morphologically indentical but physiologically dissimilar non-ciliated gametes. For development of gametes, some of the cell start to act like male and female gametangia in which the cell contents become separated from the cell wall. Shrink and ultimately forms gametes. The fusion of these gemetes takes place by scalariform conjugation or lateral conjugation.
AIPMT-2003
Plant kingdom
259214
Ulothrix filaments produce
1 heterogametes
2 basidiospores
3 isogametes
4 anisogametes
Explanation:
Ulothrix is member of class chlorophyceae. The member of class chlorophyceae are commonly called green algae. Vegetative reproduction usually takes place by fragmentation or by formation of different types of spores. The Ulothrix sexually reproduces by biflagellate gametes. The isogametes of Ulothrix are biflagellate. Their size is even smaller than micro zoospores.
AIPMT-1997
Plant kingdom
259215
Brown algae is characterised by the presence of
1 fucoxanthin
2 haematochrome
3 phycocyanin
4 phycoerythrin
Explanation:
The members of phaeophyceae (Brown algae) are found primarily in marine habitate. They show great variation in size and form. They possess chlorophyll a,c carotenoids and xanthophylls. They vary in colour from olive green to various shades of brown, depending upon the amount of the xanthophyll pigment, fucoxanthin present in them.
AIPMT-1997
Plant kingdom
259265
Comparable to angiosperms, which of the following algae exhibits diplontic life cycle?
1 Spirogyra
2 Ectocarpus
3 Polysiphonia
4 Fucus
Explanation:
A brown alga known as fucus (rockweed) exhibits a diploid life history that is comparabt to that of angiosperms. Spirogyra, Volvox exhibits haplontic pattern of life cycle whereas Ectocarpus, Polysiphonia \& kelp are haplo-diplontic.
259213
Sexual reproduction in Spirogyra is an advanced feature because it shows: -
1 Different size of motile sex organs
2 Same size of motile sex organs
3 Morphologically different sex organs
4 Physiologically differentiated sex organs
Explanation:
Spirogyra is a freshwater green alga which belongs to class chlorophyceae. The sexual reproduction in spirogyra is called conjugation. It involves the fussion of two morphologically indentical but physiologically dissimilar non-ciliated gametes. For development of gametes, some of the cell start to act like male and female gametangia in which the cell contents become separated from the cell wall. Shrink and ultimately forms gametes. The fusion of these gemetes takes place by scalariform conjugation or lateral conjugation.
AIPMT-2003
Plant kingdom
259214
Ulothrix filaments produce
1 heterogametes
2 basidiospores
3 isogametes
4 anisogametes
Explanation:
Ulothrix is member of class chlorophyceae. The member of class chlorophyceae are commonly called green algae. Vegetative reproduction usually takes place by fragmentation or by formation of different types of spores. The Ulothrix sexually reproduces by biflagellate gametes. The isogametes of Ulothrix are biflagellate. Their size is even smaller than micro zoospores.
AIPMT-1997
Plant kingdom
259215
Brown algae is characterised by the presence of
1 fucoxanthin
2 haematochrome
3 phycocyanin
4 phycoerythrin
Explanation:
The members of phaeophyceae (Brown algae) are found primarily in marine habitate. They show great variation in size and form. They possess chlorophyll a,c carotenoids and xanthophylls. They vary in colour from olive green to various shades of brown, depending upon the amount of the xanthophyll pigment, fucoxanthin present in them.
AIPMT-1997
Plant kingdom
259265
Comparable to angiosperms, which of the following algae exhibits diplontic life cycle?
1 Spirogyra
2 Ectocarpus
3 Polysiphonia
4 Fucus
Explanation:
A brown alga known as fucus (rockweed) exhibits a diploid life history that is comparabt to that of angiosperms. Spirogyra, Volvox exhibits haplontic pattern of life cycle whereas Ectocarpus, Polysiphonia \& kelp are haplo-diplontic.
259213
Sexual reproduction in Spirogyra is an advanced feature because it shows: -
1 Different size of motile sex organs
2 Same size of motile sex organs
3 Morphologically different sex organs
4 Physiologically differentiated sex organs
Explanation:
Spirogyra is a freshwater green alga which belongs to class chlorophyceae. The sexual reproduction in spirogyra is called conjugation. It involves the fussion of two morphologically indentical but physiologically dissimilar non-ciliated gametes. For development of gametes, some of the cell start to act like male and female gametangia in which the cell contents become separated from the cell wall. Shrink and ultimately forms gametes. The fusion of these gemetes takes place by scalariform conjugation or lateral conjugation.
AIPMT-2003
Plant kingdom
259214
Ulothrix filaments produce
1 heterogametes
2 basidiospores
3 isogametes
4 anisogametes
Explanation:
Ulothrix is member of class chlorophyceae. The member of class chlorophyceae are commonly called green algae. Vegetative reproduction usually takes place by fragmentation or by formation of different types of spores. The Ulothrix sexually reproduces by biflagellate gametes. The isogametes of Ulothrix are biflagellate. Their size is even smaller than micro zoospores.
AIPMT-1997
Plant kingdom
259215
Brown algae is characterised by the presence of
1 fucoxanthin
2 haematochrome
3 phycocyanin
4 phycoerythrin
Explanation:
The members of phaeophyceae (Brown algae) are found primarily in marine habitate. They show great variation in size and form. They possess chlorophyll a,c carotenoids and xanthophylls. They vary in colour from olive green to various shades of brown, depending upon the amount of the xanthophyll pigment, fucoxanthin present in them.
AIPMT-1997
Plant kingdom
259265
Comparable to angiosperms, which of the following algae exhibits diplontic life cycle?
1 Spirogyra
2 Ectocarpus
3 Polysiphonia
4 Fucus
Explanation:
A brown alga known as fucus (rockweed) exhibits a diploid life history that is comparabt to that of angiosperms. Spirogyra, Volvox exhibits haplontic pattern of life cycle whereas Ectocarpus, Polysiphonia \& kelp are haplo-diplontic.
