259855
Which of the following statement is correct?
1 In Cycas, megasporophyll produce pollen grains
2 In Agaricus gills produce basidiospores
3 In Aspergillus, fruiting body is perithecium
4 In Funaria capsule represents gametophytic generation
Explanation:
Agaricus completes its sexual cycle by producing basidiospores on the margins of the gills of the mushroom. Like almost all fungi in the Basidiomycete group, the organism exists primarly in a dikaryon state where each cell has two nuclei one from each parent produced after two haploid hyphae fuse. Short lived primary mycelium originates from homokaryotic basidiospores.
Rajasthan PMT-2002
Plant kingdom
259858
Which one of the following has haplontic life cycle ?
1 Wheat
2 Funaria
3 Polytrichum
4 Ustilago
Explanation:
Ustilago shows haplontic life cycle. Where the haploid stage is multicellular and the diploid stage is unicellular. When a plant has been haploid for the life cycle, it is referred to as the haplontic life cycle. Lifecycles can be haploid, diploid or alternating between the two and may either be haplontic, diplontic or haplo-diplontic.
AIPMT-2009
Plant kingdom
259862
Flagellated male gametes are present in all the three of which one of the following sets ?
1 Riccia, Dryopteris and Cycas
2 Anthoceros, Funaria and Spirogyra
3 Zygnema, Saprolegnia and Hydrilla
4 Fucus, Marsilea and Calotropis
Explanation:
There are two types of gametes male and female gametes that when fused produce offspring. A genus of liver worts called Riccia is a bryophytes male gametes on it are biflagellated. Dryopteris is a pteridophyte and have a multiflagellate male gametophyte. The gymnosperm group of plants includes cycas which have muciliated male gametes. The male gametes in cycas are top shaped, equal and spirally coiled.
AIPMT-2007
Plant kingdom
259866
Which of the following taxa shows zooidogamous oogamy? (i) Spirogyra (ii) Funaria (iii) Pteris (iv) Cycas The correct sequence is :
1 (i), (ii), (iii)
2 (i), (iii), (iv)
3 (i), (ii), (iv)
4 (ii), (iii), (iv)
Explanation:
Zooidogamy is a type of fertilization which is seen in certain plants, in which male gametes swim in the water to reach the female gametes, thus male gametes are motile and flagellated, which helps them to swim in water. For example, bryophytes, pteridophytes and some gymnosperms exhibit zooidogamy during sexual reproduction. - In Funaria, a liberated antherozoid swim towards the female archegonium in the presence of water. - Pteris reproduces vegetatively by the older rhizome segments eventually dying and decomposing. They therefore fall under the category of pteridophytes. - In Cycas, they are oogamous where the male gamete is significantly larger than the male. The male gamete being motile reaches up the female gamete in order to take in for fertilization.
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Plant kingdom
259855
Which of the following statement is correct?
1 In Cycas, megasporophyll produce pollen grains
2 In Agaricus gills produce basidiospores
3 In Aspergillus, fruiting body is perithecium
4 In Funaria capsule represents gametophytic generation
Explanation:
Agaricus completes its sexual cycle by producing basidiospores on the margins of the gills of the mushroom. Like almost all fungi in the Basidiomycete group, the organism exists primarly in a dikaryon state where each cell has two nuclei one from each parent produced after two haploid hyphae fuse. Short lived primary mycelium originates from homokaryotic basidiospores.
Rajasthan PMT-2002
Plant kingdom
259858
Which one of the following has haplontic life cycle ?
1 Wheat
2 Funaria
3 Polytrichum
4 Ustilago
Explanation:
Ustilago shows haplontic life cycle. Where the haploid stage is multicellular and the diploid stage is unicellular. When a plant has been haploid for the life cycle, it is referred to as the haplontic life cycle. Lifecycles can be haploid, diploid or alternating between the two and may either be haplontic, diplontic or haplo-diplontic.
AIPMT-2009
Plant kingdom
259862
Flagellated male gametes are present in all the three of which one of the following sets ?
1 Riccia, Dryopteris and Cycas
2 Anthoceros, Funaria and Spirogyra
3 Zygnema, Saprolegnia and Hydrilla
4 Fucus, Marsilea and Calotropis
Explanation:
There are two types of gametes male and female gametes that when fused produce offspring. A genus of liver worts called Riccia is a bryophytes male gametes on it are biflagellated. Dryopteris is a pteridophyte and have a multiflagellate male gametophyte. The gymnosperm group of plants includes cycas which have muciliated male gametes. The male gametes in cycas are top shaped, equal and spirally coiled.
AIPMT-2007
Plant kingdom
259866
Which of the following taxa shows zooidogamous oogamy? (i) Spirogyra (ii) Funaria (iii) Pteris (iv) Cycas The correct sequence is :
1 (i), (ii), (iii)
2 (i), (iii), (iv)
3 (i), (ii), (iv)
4 (ii), (iii), (iv)
Explanation:
Zooidogamy is a type of fertilization which is seen in certain plants, in which male gametes swim in the water to reach the female gametes, thus male gametes are motile and flagellated, which helps them to swim in water. For example, bryophytes, pteridophytes and some gymnosperms exhibit zooidogamy during sexual reproduction. - In Funaria, a liberated antherozoid swim towards the female archegonium in the presence of water. - Pteris reproduces vegetatively by the older rhizome segments eventually dying and decomposing. They therefore fall under the category of pteridophytes. - In Cycas, they are oogamous where the male gamete is significantly larger than the male. The male gamete being motile reaches up the female gamete in order to take in for fertilization.
259855
Which of the following statement is correct?
1 In Cycas, megasporophyll produce pollen grains
2 In Agaricus gills produce basidiospores
3 In Aspergillus, fruiting body is perithecium
4 In Funaria capsule represents gametophytic generation
Explanation:
Agaricus completes its sexual cycle by producing basidiospores on the margins of the gills of the mushroom. Like almost all fungi in the Basidiomycete group, the organism exists primarly in a dikaryon state where each cell has two nuclei one from each parent produced after two haploid hyphae fuse. Short lived primary mycelium originates from homokaryotic basidiospores.
Rajasthan PMT-2002
Plant kingdom
259858
Which one of the following has haplontic life cycle ?
1 Wheat
2 Funaria
3 Polytrichum
4 Ustilago
Explanation:
Ustilago shows haplontic life cycle. Where the haploid stage is multicellular and the diploid stage is unicellular. When a plant has been haploid for the life cycle, it is referred to as the haplontic life cycle. Lifecycles can be haploid, diploid or alternating between the two and may either be haplontic, diplontic or haplo-diplontic.
AIPMT-2009
Plant kingdom
259862
Flagellated male gametes are present in all the three of which one of the following sets ?
1 Riccia, Dryopteris and Cycas
2 Anthoceros, Funaria and Spirogyra
3 Zygnema, Saprolegnia and Hydrilla
4 Fucus, Marsilea and Calotropis
Explanation:
There are two types of gametes male and female gametes that when fused produce offspring. A genus of liver worts called Riccia is a bryophytes male gametes on it are biflagellated. Dryopteris is a pteridophyte and have a multiflagellate male gametophyte. The gymnosperm group of plants includes cycas which have muciliated male gametes. The male gametes in cycas are top shaped, equal and spirally coiled.
AIPMT-2007
Plant kingdom
259866
Which of the following taxa shows zooidogamous oogamy? (i) Spirogyra (ii) Funaria (iii) Pteris (iv) Cycas The correct sequence is :
1 (i), (ii), (iii)
2 (i), (iii), (iv)
3 (i), (ii), (iv)
4 (ii), (iii), (iv)
Explanation:
Zooidogamy is a type of fertilization which is seen in certain plants, in which male gametes swim in the water to reach the female gametes, thus male gametes are motile and flagellated, which helps them to swim in water. For example, bryophytes, pteridophytes and some gymnosperms exhibit zooidogamy during sexual reproduction. - In Funaria, a liberated antherozoid swim towards the female archegonium in the presence of water. - Pteris reproduces vegetatively by the older rhizome segments eventually dying and decomposing. They therefore fall under the category of pteridophytes. - In Cycas, they are oogamous where the male gamete is significantly larger than the male. The male gamete being motile reaches up the female gamete in order to take in for fertilization.
259855
Which of the following statement is correct?
1 In Cycas, megasporophyll produce pollen grains
2 In Agaricus gills produce basidiospores
3 In Aspergillus, fruiting body is perithecium
4 In Funaria capsule represents gametophytic generation
Explanation:
Agaricus completes its sexual cycle by producing basidiospores on the margins of the gills of the mushroom. Like almost all fungi in the Basidiomycete group, the organism exists primarly in a dikaryon state where each cell has two nuclei one from each parent produced after two haploid hyphae fuse. Short lived primary mycelium originates from homokaryotic basidiospores.
Rajasthan PMT-2002
Plant kingdom
259858
Which one of the following has haplontic life cycle ?
1 Wheat
2 Funaria
3 Polytrichum
4 Ustilago
Explanation:
Ustilago shows haplontic life cycle. Where the haploid stage is multicellular and the diploid stage is unicellular. When a plant has been haploid for the life cycle, it is referred to as the haplontic life cycle. Lifecycles can be haploid, diploid or alternating between the two and may either be haplontic, diplontic or haplo-diplontic.
AIPMT-2009
Plant kingdom
259862
Flagellated male gametes are present in all the three of which one of the following sets ?
1 Riccia, Dryopteris and Cycas
2 Anthoceros, Funaria and Spirogyra
3 Zygnema, Saprolegnia and Hydrilla
4 Fucus, Marsilea and Calotropis
Explanation:
There are two types of gametes male and female gametes that when fused produce offspring. A genus of liver worts called Riccia is a bryophytes male gametes on it are biflagellated. Dryopteris is a pteridophyte and have a multiflagellate male gametophyte. The gymnosperm group of plants includes cycas which have muciliated male gametes. The male gametes in cycas are top shaped, equal and spirally coiled.
AIPMT-2007
Plant kingdom
259866
Which of the following taxa shows zooidogamous oogamy? (i) Spirogyra (ii) Funaria (iii) Pteris (iv) Cycas The correct sequence is :
1 (i), (ii), (iii)
2 (i), (iii), (iv)
3 (i), (ii), (iv)
4 (ii), (iii), (iv)
Explanation:
Zooidogamy is a type of fertilization which is seen in certain plants, in which male gametes swim in the water to reach the female gametes, thus male gametes are motile and flagellated, which helps them to swim in water. For example, bryophytes, pteridophytes and some gymnosperms exhibit zooidogamy during sexual reproduction. - In Funaria, a liberated antherozoid swim towards the female archegonium in the presence of water. - Pteris reproduces vegetatively by the older rhizome segments eventually dying and decomposing. They therefore fall under the category of pteridophytes. - In Cycas, they are oogamous where the male gamete is significantly larger than the male. The male gamete being motile reaches up the female gamete in order to take in for fertilization.
