NEET Test Series from KOTA - 10 Papers In MS WORD
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Evolution
184814
Biological concept of species is mainly based on
1 reproductive isolation
2 morphological features only
3 methods of reproduction only
4 morphology and methods of reproduction
Explanation:
Reproductive isolation is the prevention of interbreeding between the populations of two different species. According to Mayr reproductive isolating mechanism is the biological concept of species or biological properties of individual which prevent the interbreeding of naturally sympatric population (groups from the same ancestral population evolve into separate species without any geographical separation). It maintains the characters of species but can lead to the origin of new species.
UP CPMT-2012
Evolution
184815
Urey-Millers experiment mixture had the following except
1 methane
2 \(\mathrm{CO}_{2}\)
3 hydrogen
4 water vapour
Explanation:
Urey-Millers experiment mixture had the following except \(\mathrm{CO}_{2}\). Stanley Miller in 1953, who was then a graduate student at the University of Chicago, approched Harold Urey demonstrated it clearly that ultra-violet radiations or electrical discharges or heat or a combination of these can produce complex organic compounds from a mixture of methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), water vapour and hydrogen \(\left(\mathrm{H}_{2}\right)\). His experiment proved that organic compounds were basis of life.
J and K CET-2009
Evolution
184829
Chemical theory of origin was given by :
1 Spallanzani
2 Louis Pasteur
3 Oparin and Haldane
4 Stanley Miller
Explanation:
Oparin and Haldane theory is also called chemical theory or naturalistic theory. According to this theory, life originated upon our earth spontaneously from non-living matter. First inorganic compounds and then organic compounds were formed in accordance with over changing environmental conditions. This is called chemical evolution which cannot occur under present environmental conditions upon earth. Conditions suitable for origin of life existed only upon primitive earth.
JCECE-2018 / Kerala PMT-2012
Evolution
184847
Panspermia, an idea that is still a favourite for some astronomers, means:
1 Creation of life from dead and decaying
2 Creation of life from chemicals
3 Origin of sperm in human testes
4 Transfer of spores as unit of life from other planets to Earth
Explanation:
The panspermia theory argues that life is originated in space, in spatial ices, and continuously distributed to the planets by comets and meteorites. "Panspermia" is still a favourite idea for some astronomers. For a long time it was also believed that life came out of decaying and rotting matter like straw, draw mud etc. This was the spontaneous generation.
184814
Biological concept of species is mainly based on
1 reproductive isolation
2 morphological features only
3 methods of reproduction only
4 morphology and methods of reproduction
Explanation:
Reproductive isolation is the prevention of interbreeding between the populations of two different species. According to Mayr reproductive isolating mechanism is the biological concept of species or biological properties of individual which prevent the interbreeding of naturally sympatric population (groups from the same ancestral population evolve into separate species without any geographical separation). It maintains the characters of species but can lead to the origin of new species.
UP CPMT-2012
Evolution
184815
Urey-Millers experiment mixture had the following except
1 methane
2 \(\mathrm{CO}_{2}\)
3 hydrogen
4 water vapour
Explanation:
Urey-Millers experiment mixture had the following except \(\mathrm{CO}_{2}\). Stanley Miller in 1953, who was then a graduate student at the University of Chicago, approched Harold Urey demonstrated it clearly that ultra-violet radiations or electrical discharges or heat or a combination of these can produce complex organic compounds from a mixture of methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), water vapour and hydrogen \(\left(\mathrm{H}_{2}\right)\). His experiment proved that organic compounds were basis of life.
J and K CET-2009
Evolution
184829
Chemical theory of origin was given by :
1 Spallanzani
2 Louis Pasteur
3 Oparin and Haldane
4 Stanley Miller
Explanation:
Oparin and Haldane theory is also called chemical theory or naturalistic theory. According to this theory, life originated upon our earth spontaneously from non-living matter. First inorganic compounds and then organic compounds were formed in accordance with over changing environmental conditions. This is called chemical evolution which cannot occur under present environmental conditions upon earth. Conditions suitable for origin of life existed only upon primitive earth.
JCECE-2018 / Kerala PMT-2012
Evolution
184847
Panspermia, an idea that is still a favourite for some astronomers, means:
1 Creation of life from dead and decaying
2 Creation of life from chemicals
3 Origin of sperm in human testes
4 Transfer of spores as unit of life from other planets to Earth
Explanation:
The panspermia theory argues that life is originated in space, in spatial ices, and continuously distributed to the planets by comets and meteorites. "Panspermia" is still a favourite idea for some astronomers. For a long time it was also believed that life came out of decaying and rotting matter like straw, draw mud etc. This was the spontaneous generation.
184814
Biological concept of species is mainly based on
1 reproductive isolation
2 morphological features only
3 methods of reproduction only
4 morphology and methods of reproduction
Explanation:
Reproductive isolation is the prevention of interbreeding between the populations of two different species. According to Mayr reproductive isolating mechanism is the biological concept of species or biological properties of individual which prevent the interbreeding of naturally sympatric population (groups from the same ancestral population evolve into separate species without any geographical separation). It maintains the characters of species but can lead to the origin of new species.
UP CPMT-2012
Evolution
184815
Urey-Millers experiment mixture had the following except
1 methane
2 \(\mathrm{CO}_{2}\)
3 hydrogen
4 water vapour
Explanation:
Urey-Millers experiment mixture had the following except \(\mathrm{CO}_{2}\). Stanley Miller in 1953, who was then a graduate student at the University of Chicago, approched Harold Urey demonstrated it clearly that ultra-violet radiations or electrical discharges or heat or a combination of these can produce complex organic compounds from a mixture of methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), water vapour and hydrogen \(\left(\mathrm{H}_{2}\right)\). His experiment proved that organic compounds were basis of life.
J and K CET-2009
Evolution
184829
Chemical theory of origin was given by :
1 Spallanzani
2 Louis Pasteur
3 Oparin and Haldane
4 Stanley Miller
Explanation:
Oparin and Haldane theory is also called chemical theory or naturalistic theory. According to this theory, life originated upon our earth spontaneously from non-living matter. First inorganic compounds and then organic compounds were formed in accordance with over changing environmental conditions. This is called chemical evolution which cannot occur under present environmental conditions upon earth. Conditions suitable for origin of life existed only upon primitive earth.
JCECE-2018 / Kerala PMT-2012
Evolution
184847
Panspermia, an idea that is still a favourite for some astronomers, means:
1 Creation of life from dead and decaying
2 Creation of life from chemicals
3 Origin of sperm in human testes
4 Transfer of spores as unit of life from other planets to Earth
Explanation:
The panspermia theory argues that life is originated in space, in spatial ices, and continuously distributed to the planets by comets and meteorites. "Panspermia" is still a favourite idea for some astronomers. For a long time it was also believed that life came out of decaying and rotting matter like straw, draw mud etc. This was the spontaneous generation.
184814
Biological concept of species is mainly based on
1 reproductive isolation
2 morphological features only
3 methods of reproduction only
4 morphology and methods of reproduction
Explanation:
Reproductive isolation is the prevention of interbreeding between the populations of two different species. According to Mayr reproductive isolating mechanism is the biological concept of species or biological properties of individual which prevent the interbreeding of naturally sympatric population (groups from the same ancestral population evolve into separate species without any geographical separation). It maintains the characters of species but can lead to the origin of new species.
UP CPMT-2012
Evolution
184815
Urey-Millers experiment mixture had the following except
1 methane
2 \(\mathrm{CO}_{2}\)
3 hydrogen
4 water vapour
Explanation:
Urey-Millers experiment mixture had the following except \(\mathrm{CO}_{2}\). Stanley Miller in 1953, who was then a graduate student at the University of Chicago, approched Harold Urey demonstrated it clearly that ultra-violet radiations or electrical discharges or heat or a combination of these can produce complex organic compounds from a mixture of methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), water vapour and hydrogen \(\left(\mathrm{H}_{2}\right)\). His experiment proved that organic compounds were basis of life.
J and K CET-2009
Evolution
184829
Chemical theory of origin was given by :
1 Spallanzani
2 Louis Pasteur
3 Oparin and Haldane
4 Stanley Miller
Explanation:
Oparin and Haldane theory is also called chemical theory or naturalistic theory. According to this theory, life originated upon our earth spontaneously from non-living matter. First inorganic compounds and then organic compounds were formed in accordance with over changing environmental conditions. This is called chemical evolution which cannot occur under present environmental conditions upon earth. Conditions suitable for origin of life existed only upon primitive earth.
JCECE-2018 / Kerala PMT-2012
Evolution
184847
Panspermia, an idea that is still a favourite for some astronomers, means:
1 Creation of life from dead and decaying
2 Creation of life from chemicals
3 Origin of sperm in human testes
4 Transfer of spores as unit of life from other planets to Earth
Explanation:
The panspermia theory argues that life is originated in space, in spatial ices, and continuously distributed to the planets by comets and meteorites. "Panspermia" is still a favourite idea for some astronomers. For a long time it was also believed that life came out of decaying and rotting matter like straw, draw mud etc. This was the spontaneous generation.
