In the life cycle of bryophytes, the gametophytic generation is the major stage. Gametophyte activity determines the sporophyte phase. That is why, the plant body of funaria moss is predominantly gametophytic with dependent sporophyte. - Zygote develops into sporophyte and produces haploid meiospores which on germination form gametophyte. Sporophyte in mosses is differentiated into foot, seta and capsule.
AIIMS-2002
Plant kingdom
259843
Mosses and ferns are found in moist and shady places because both
1 Require presence of water for fertilization
2 Do not need sunlight for photosynthesis
3 Depend for their nutrition on microorganisms which can survive only at low temperature
4 Cannot compete with sun-loving plants.
Explanation:
Mosses and ferns can only reproduce in the presence of water, via motile antherozoids that swim to reach the archegonium, hence they can only be found in damp environments. Mosses lack vascular tissue, also both mosses and ferns require water to carry out sexual reproduction.
AIIMS-2004
Plant kingdom
259845
Physiological heterospory is seen in :
1 chlamydomonas
2 rhizopus
3 selaginella
4 lycopodium
Explanation:
Selaginella Heterospory is important with respect to the evolutionary perspective. Heterospory is found in some pteridophytes and all seed plants i.e. gymnosperms and angiosperms. In selaginella, all the microsporocytes or microspore mother cells undergo meiosis to produce a large number of microspore whereas only one megasporocyte is functional and produces four large megaspores after meiosis. - Heterospory become evident before meiosis as in selaginella. - Microspore are present in microsporangia, whereas megaspore are present in magasporangia.
DUMET-2004
Plant kingdom
259846
In prothallus of a vascular cryptogamic, the antherozoids and eggs mature at different times. As a result of
1 self-fertillisation is prevented
2 it can be concluded that plant is apomictic
3 there is a low degree of fertility
4 no change in success rate of fertilization
Explanation:
Vascular cryptogams usually multiply through sexual reproduction. They adopt various methods in order to prevent self-fertilization. When an antherozoid and an egg from the same plant develop at different time they are unable to fertilize one another, avoiding self-fertilization. If the antherozoid matures before egg it is termed as protandry. If the egg matures before antherozoid it is termed protogyny - The difference in maturation period of antherozoid and egg has no relation with fertility rate in the plant. Its nothing more than a plant's way of preventing selffertilization. - The success rate of self-fertilization decreases while that of cross fertilization increases
Manipal-2014
Plant kingdom
259851
The gametophyte generation is dominant in:
1 Gymnosperm
2 Bryophyte
3 Angiosperm
4 Pteridophyta
Explanation:
Gametophyte generation is dominant in Bryophyte \& life cycle is haplo -diplontic. Sporophytic generation is dominant in pteridophyta \& life cycle is haplo-diplontic. Gymnosperm - sporophytic phase is dominant- life cycle is Diplontic
In the life cycle of bryophytes, the gametophytic generation is the major stage. Gametophyte activity determines the sporophyte phase. That is why, the plant body of funaria moss is predominantly gametophytic with dependent sporophyte. - Zygote develops into sporophyte and produces haploid meiospores which on germination form gametophyte. Sporophyte in mosses is differentiated into foot, seta and capsule.
AIIMS-2002
Plant kingdom
259843
Mosses and ferns are found in moist and shady places because both
1 Require presence of water for fertilization
2 Do not need sunlight for photosynthesis
3 Depend for their nutrition on microorganisms which can survive only at low temperature
4 Cannot compete with sun-loving plants.
Explanation:
Mosses and ferns can only reproduce in the presence of water, via motile antherozoids that swim to reach the archegonium, hence they can only be found in damp environments. Mosses lack vascular tissue, also both mosses and ferns require water to carry out sexual reproduction.
AIIMS-2004
Plant kingdom
259845
Physiological heterospory is seen in :
1 chlamydomonas
2 rhizopus
3 selaginella
4 lycopodium
Explanation:
Selaginella Heterospory is important with respect to the evolutionary perspective. Heterospory is found in some pteridophytes and all seed plants i.e. gymnosperms and angiosperms. In selaginella, all the microsporocytes or microspore mother cells undergo meiosis to produce a large number of microspore whereas only one megasporocyte is functional and produces four large megaspores after meiosis. - Heterospory become evident before meiosis as in selaginella. - Microspore are present in microsporangia, whereas megaspore are present in magasporangia.
DUMET-2004
Plant kingdom
259846
In prothallus of a vascular cryptogamic, the antherozoids and eggs mature at different times. As a result of
1 self-fertillisation is prevented
2 it can be concluded that plant is apomictic
3 there is a low degree of fertility
4 no change in success rate of fertilization
Explanation:
Vascular cryptogams usually multiply through sexual reproduction. They adopt various methods in order to prevent self-fertilization. When an antherozoid and an egg from the same plant develop at different time they are unable to fertilize one another, avoiding self-fertilization. If the antherozoid matures before egg it is termed as protandry. If the egg matures before antherozoid it is termed protogyny - The difference in maturation period of antherozoid and egg has no relation with fertility rate in the plant. Its nothing more than a plant's way of preventing selffertilization. - The success rate of self-fertilization decreases while that of cross fertilization increases
Manipal-2014
Plant kingdom
259851
The gametophyte generation is dominant in:
1 Gymnosperm
2 Bryophyte
3 Angiosperm
4 Pteridophyta
Explanation:
Gametophyte generation is dominant in Bryophyte \& life cycle is haplo -diplontic. Sporophytic generation is dominant in pteridophyta \& life cycle is haplo-diplontic. Gymnosperm - sporophytic phase is dominant- life cycle is Diplontic
In the life cycle of bryophytes, the gametophytic generation is the major stage. Gametophyte activity determines the sporophyte phase. That is why, the plant body of funaria moss is predominantly gametophytic with dependent sporophyte. - Zygote develops into sporophyte and produces haploid meiospores which on germination form gametophyte. Sporophyte in mosses is differentiated into foot, seta and capsule.
AIIMS-2002
Plant kingdom
259843
Mosses and ferns are found in moist and shady places because both
1 Require presence of water for fertilization
2 Do not need sunlight for photosynthesis
3 Depend for their nutrition on microorganisms which can survive only at low temperature
4 Cannot compete with sun-loving plants.
Explanation:
Mosses and ferns can only reproduce in the presence of water, via motile antherozoids that swim to reach the archegonium, hence they can only be found in damp environments. Mosses lack vascular tissue, also both mosses and ferns require water to carry out sexual reproduction.
AIIMS-2004
Plant kingdom
259845
Physiological heterospory is seen in :
1 chlamydomonas
2 rhizopus
3 selaginella
4 lycopodium
Explanation:
Selaginella Heterospory is important with respect to the evolutionary perspective. Heterospory is found in some pteridophytes and all seed plants i.e. gymnosperms and angiosperms. In selaginella, all the microsporocytes or microspore mother cells undergo meiosis to produce a large number of microspore whereas only one megasporocyte is functional and produces four large megaspores after meiosis. - Heterospory become evident before meiosis as in selaginella. - Microspore are present in microsporangia, whereas megaspore are present in magasporangia.
DUMET-2004
Plant kingdom
259846
In prothallus of a vascular cryptogamic, the antherozoids and eggs mature at different times. As a result of
1 self-fertillisation is prevented
2 it can be concluded that plant is apomictic
3 there is a low degree of fertility
4 no change in success rate of fertilization
Explanation:
Vascular cryptogams usually multiply through sexual reproduction. They adopt various methods in order to prevent self-fertilization. When an antherozoid and an egg from the same plant develop at different time they are unable to fertilize one another, avoiding self-fertilization. If the antherozoid matures before egg it is termed as protandry. If the egg matures before antherozoid it is termed protogyny - The difference in maturation period of antherozoid and egg has no relation with fertility rate in the plant. Its nothing more than a plant's way of preventing selffertilization. - The success rate of self-fertilization decreases while that of cross fertilization increases
Manipal-2014
Plant kingdom
259851
The gametophyte generation is dominant in:
1 Gymnosperm
2 Bryophyte
3 Angiosperm
4 Pteridophyta
Explanation:
Gametophyte generation is dominant in Bryophyte \& life cycle is haplo -diplontic. Sporophytic generation is dominant in pteridophyta \& life cycle is haplo-diplontic. Gymnosperm - sporophytic phase is dominant- life cycle is Diplontic
NEET Test Series from KOTA - 10 Papers In MS WORD
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Plant kingdom
259842
The plant body of moss (Funaria) is
1 Completely sporophyte
2 Predominantly sporophyte with gametophyte
3 Completely gametophyte
4 Predominantly gametophyte with sporophyte.
Explanation:
In the life cycle of bryophytes, the gametophytic generation is the major stage. Gametophyte activity determines the sporophyte phase. That is why, the plant body of funaria moss is predominantly gametophytic with dependent sporophyte. - Zygote develops into sporophyte and produces haploid meiospores which on germination form gametophyte. Sporophyte in mosses is differentiated into foot, seta and capsule.
AIIMS-2002
Plant kingdom
259843
Mosses and ferns are found in moist and shady places because both
1 Require presence of water for fertilization
2 Do not need sunlight for photosynthesis
3 Depend for their nutrition on microorganisms which can survive only at low temperature
4 Cannot compete with sun-loving plants.
Explanation:
Mosses and ferns can only reproduce in the presence of water, via motile antherozoids that swim to reach the archegonium, hence they can only be found in damp environments. Mosses lack vascular tissue, also both mosses and ferns require water to carry out sexual reproduction.
AIIMS-2004
Plant kingdom
259845
Physiological heterospory is seen in :
1 chlamydomonas
2 rhizopus
3 selaginella
4 lycopodium
Explanation:
Selaginella Heterospory is important with respect to the evolutionary perspective. Heterospory is found in some pteridophytes and all seed plants i.e. gymnosperms and angiosperms. In selaginella, all the microsporocytes or microspore mother cells undergo meiosis to produce a large number of microspore whereas only one megasporocyte is functional and produces four large megaspores after meiosis. - Heterospory become evident before meiosis as in selaginella. - Microspore are present in microsporangia, whereas megaspore are present in magasporangia.
DUMET-2004
Plant kingdom
259846
In prothallus of a vascular cryptogamic, the antherozoids and eggs mature at different times. As a result of
1 self-fertillisation is prevented
2 it can be concluded that plant is apomictic
3 there is a low degree of fertility
4 no change in success rate of fertilization
Explanation:
Vascular cryptogams usually multiply through sexual reproduction. They adopt various methods in order to prevent self-fertilization. When an antherozoid and an egg from the same plant develop at different time they are unable to fertilize one another, avoiding self-fertilization. If the antherozoid matures before egg it is termed as protandry. If the egg matures before antherozoid it is termed protogyny - The difference in maturation period of antherozoid and egg has no relation with fertility rate in the plant. Its nothing more than a plant's way of preventing selffertilization. - The success rate of self-fertilization decreases while that of cross fertilization increases
Manipal-2014
Plant kingdom
259851
The gametophyte generation is dominant in:
1 Gymnosperm
2 Bryophyte
3 Angiosperm
4 Pteridophyta
Explanation:
Gametophyte generation is dominant in Bryophyte \& life cycle is haplo -diplontic. Sporophytic generation is dominant in pteridophyta \& life cycle is haplo-diplontic. Gymnosperm - sporophytic phase is dominant- life cycle is Diplontic
In the life cycle of bryophytes, the gametophytic generation is the major stage. Gametophyte activity determines the sporophyte phase. That is why, the plant body of funaria moss is predominantly gametophytic with dependent sporophyte. - Zygote develops into sporophyte and produces haploid meiospores which on germination form gametophyte. Sporophyte in mosses is differentiated into foot, seta and capsule.
AIIMS-2002
Plant kingdom
259843
Mosses and ferns are found in moist and shady places because both
1 Require presence of water for fertilization
2 Do not need sunlight for photosynthesis
3 Depend for their nutrition on microorganisms which can survive only at low temperature
4 Cannot compete with sun-loving plants.
Explanation:
Mosses and ferns can only reproduce in the presence of water, via motile antherozoids that swim to reach the archegonium, hence they can only be found in damp environments. Mosses lack vascular tissue, also both mosses and ferns require water to carry out sexual reproduction.
AIIMS-2004
Plant kingdom
259845
Physiological heterospory is seen in :
1 chlamydomonas
2 rhizopus
3 selaginella
4 lycopodium
Explanation:
Selaginella Heterospory is important with respect to the evolutionary perspective. Heterospory is found in some pteridophytes and all seed plants i.e. gymnosperms and angiosperms. In selaginella, all the microsporocytes or microspore mother cells undergo meiosis to produce a large number of microspore whereas only one megasporocyte is functional and produces four large megaspores after meiosis. - Heterospory become evident before meiosis as in selaginella. - Microspore are present in microsporangia, whereas megaspore are present in magasporangia.
DUMET-2004
Plant kingdom
259846
In prothallus of a vascular cryptogamic, the antherozoids and eggs mature at different times. As a result of
1 self-fertillisation is prevented
2 it can be concluded that plant is apomictic
3 there is a low degree of fertility
4 no change in success rate of fertilization
Explanation:
Vascular cryptogams usually multiply through sexual reproduction. They adopt various methods in order to prevent self-fertilization. When an antherozoid and an egg from the same plant develop at different time they are unable to fertilize one another, avoiding self-fertilization. If the antherozoid matures before egg it is termed as protandry. If the egg matures before antherozoid it is termed protogyny - The difference in maturation period of antherozoid and egg has no relation with fertility rate in the plant. Its nothing more than a plant's way of preventing selffertilization. - The success rate of self-fertilization decreases while that of cross fertilization increases
Manipal-2014
Plant kingdom
259851
The gametophyte generation is dominant in:
1 Gymnosperm
2 Bryophyte
3 Angiosperm
4 Pteridophyta
Explanation:
Gametophyte generation is dominant in Bryophyte \& life cycle is haplo -diplontic. Sporophytic generation is dominant in pteridophyta \& life cycle is haplo-diplontic. Gymnosperm - sporophytic phase is dominant- life cycle is Diplontic
