184882
Which of these gases was/were in prebiotic atmosphere?
1 Ammonia
2 Methane
3 Oxygen
4 both a and b
Explanation:
According to 'Oparin' and 'Haldane', ammonia and methane were the gases present in prebiotic atmosphere. The idea of the prebiotic Earth as a roiling organic "soup" with a highly reduced atmosphere of \(\mathrm{H}_{2}, \mathrm{H}_{2} \mathrm{O}\), methane \(\left(\mathrm{CH}_{4}\right)\) and ammonia \(\left(\mathrm{NH}_{3}\right)\) was first presented by Oparin. Oxygen gas was not present in the early Earth atmosphere.
WB JEE-2015
Evolution
184884
Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements:
1 - (i) convergent
2 - (i) oxygen, (ii) nucleosides
3 - (i) rudimentary (ii) anatomical
4 (B) - (i) water vapour, (ii) amino acids,
Explanation:
Darwin gave the theory of natural selection, which states that evolutionary change comes through the production of variation in each generation. Wing of butterfly and birds look a like and are the results of convergent evolution. According to Darwin evolution took place due to small variations and Survival of the fittest.
AIPMT (Mains)-2010
Evolution
184886
Which one of the following scientist's name is correctly matched with the theory put forth by him?
1 Weismann-Theory of Continuity of Germplasm
2 Pasteur - Inheritance of Acquired Characters
3 de Vries - Natural Selection
4 Mendel - Theory of Pangenesis
Explanation:
The theory of the continuity of the germplasm was published by August Weismann (18341914) in 1886. It proposes that the contents of the reproductive cells (sperms and ova) are passed on unchanged from one generation to the next unaffected by any changes undergone by the rest of the body. Thus, it rules out any possibility of the inheritance of acquired characteristics, and become integral to Neo-Darwinian theory.
AP EAMCET-2011
Evolution
184888
How many years are considered in one minute in Geological clock?
1 \(1,87,500,000\) years
2 52,000 years
3 \(3,125,000\) years
4 1,90,000 years
Explanation:
C In the Geological clock, one minute is roughly equivalent to \(3,125,000\) years.
GUJCET-2015
Evolution
184889
The prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidizing atmosphere of present day due to the emergence of :
1 Cyanobacteria
2 Angiosperms
3 Photosynthetic bacteria
4 Eukaryotic algae
Explanation:
Cyanobacteria played an important role in the evolution of early Earth and the biosphere. They are responsible for the oxygenation of the atmosphere. They used water to get hydrogen and release oxygen into the atmosphere. Hence, the prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidizing atmosphere of present day due to the emergence of Cyanobacteria.
184882
Which of these gases was/were in prebiotic atmosphere?
1 Ammonia
2 Methane
3 Oxygen
4 both a and b
Explanation:
According to 'Oparin' and 'Haldane', ammonia and methane were the gases present in prebiotic atmosphere. The idea of the prebiotic Earth as a roiling organic "soup" with a highly reduced atmosphere of \(\mathrm{H}_{2}, \mathrm{H}_{2} \mathrm{O}\), methane \(\left(\mathrm{CH}_{4}\right)\) and ammonia \(\left(\mathrm{NH}_{3}\right)\) was first presented by Oparin. Oxygen gas was not present in the early Earth atmosphere.
WB JEE-2015
Evolution
184884
Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements:
1 - (i) convergent
2 - (i) oxygen, (ii) nucleosides
3 - (i) rudimentary (ii) anatomical
4 (B) - (i) water vapour, (ii) amino acids,
Explanation:
Darwin gave the theory of natural selection, which states that evolutionary change comes through the production of variation in each generation. Wing of butterfly and birds look a like and are the results of convergent evolution. According to Darwin evolution took place due to small variations and Survival of the fittest.
AIPMT (Mains)-2010
Evolution
184886
Which one of the following scientist's name is correctly matched with the theory put forth by him?
1 Weismann-Theory of Continuity of Germplasm
2 Pasteur - Inheritance of Acquired Characters
3 de Vries - Natural Selection
4 Mendel - Theory of Pangenesis
Explanation:
The theory of the continuity of the germplasm was published by August Weismann (18341914) in 1886. It proposes that the contents of the reproductive cells (sperms and ova) are passed on unchanged from one generation to the next unaffected by any changes undergone by the rest of the body. Thus, it rules out any possibility of the inheritance of acquired characteristics, and become integral to Neo-Darwinian theory.
AP EAMCET-2011
Evolution
184888
How many years are considered in one minute in Geological clock?
1 \(1,87,500,000\) years
2 52,000 years
3 \(3,125,000\) years
4 1,90,000 years
Explanation:
C In the Geological clock, one minute is roughly equivalent to \(3,125,000\) years.
GUJCET-2015
Evolution
184889
The prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidizing atmosphere of present day due to the emergence of :
1 Cyanobacteria
2 Angiosperms
3 Photosynthetic bacteria
4 Eukaryotic algae
Explanation:
Cyanobacteria played an important role in the evolution of early Earth and the biosphere. They are responsible for the oxygenation of the atmosphere. They used water to get hydrogen and release oxygen into the atmosphere. Hence, the prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidizing atmosphere of present day due to the emergence of Cyanobacteria.
184882
Which of these gases was/were in prebiotic atmosphere?
1 Ammonia
2 Methane
3 Oxygen
4 both a and b
Explanation:
According to 'Oparin' and 'Haldane', ammonia and methane were the gases present in prebiotic atmosphere. The idea of the prebiotic Earth as a roiling organic "soup" with a highly reduced atmosphere of \(\mathrm{H}_{2}, \mathrm{H}_{2} \mathrm{O}\), methane \(\left(\mathrm{CH}_{4}\right)\) and ammonia \(\left(\mathrm{NH}_{3}\right)\) was first presented by Oparin. Oxygen gas was not present in the early Earth atmosphere.
WB JEE-2015
Evolution
184884
Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements:
1 - (i) convergent
2 - (i) oxygen, (ii) nucleosides
3 - (i) rudimentary (ii) anatomical
4 (B) - (i) water vapour, (ii) amino acids,
Explanation:
Darwin gave the theory of natural selection, which states that evolutionary change comes through the production of variation in each generation. Wing of butterfly and birds look a like and are the results of convergent evolution. According to Darwin evolution took place due to small variations and Survival of the fittest.
AIPMT (Mains)-2010
Evolution
184886
Which one of the following scientist's name is correctly matched with the theory put forth by him?
1 Weismann-Theory of Continuity of Germplasm
2 Pasteur - Inheritance of Acquired Characters
3 de Vries - Natural Selection
4 Mendel - Theory of Pangenesis
Explanation:
The theory of the continuity of the germplasm was published by August Weismann (18341914) in 1886. It proposes that the contents of the reproductive cells (sperms and ova) are passed on unchanged from one generation to the next unaffected by any changes undergone by the rest of the body. Thus, it rules out any possibility of the inheritance of acquired characteristics, and become integral to Neo-Darwinian theory.
AP EAMCET-2011
Evolution
184888
How many years are considered in one minute in Geological clock?
1 \(1,87,500,000\) years
2 52,000 years
3 \(3,125,000\) years
4 1,90,000 years
Explanation:
C In the Geological clock, one minute is roughly equivalent to \(3,125,000\) years.
GUJCET-2015
Evolution
184889
The prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidizing atmosphere of present day due to the emergence of :
1 Cyanobacteria
2 Angiosperms
3 Photosynthetic bacteria
4 Eukaryotic algae
Explanation:
Cyanobacteria played an important role in the evolution of early Earth and the biosphere. They are responsible for the oxygenation of the atmosphere. They used water to get hydrogen and release oxygen into the atmosphere. Hence, the prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidizing atmosphere of present day due to the emergence of Cyanobacteria.
184882
Which of these gases was/were in prebiotic atmosphere?
1 Ammonia
2 Methane
3 Oxygen
4 both a and b
Explanation:
According to 'Oparin' and 'Haldane', ammonia and methane were the gases present in prebiotic atmosphere. The idea of the prebiotic Earth as a roiling organic "soup" with a highly reduced atmosphere of \(\mathrm{H}_{2}, \mathrm{H}_{2} \mathrm{O}\), methane \(\left(\mathrm{CH}_{4}\right)\) and ammonia \(\left(\mathrm{NH}_{3}\right)\) was first presented by Oparin. Oxygen gas was not present in the early Earth atmosphere.
WB JEE-2015
Evolution
184884
Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements:
1 - (i) convergent
2 - (i) oxygen, (ii) nucleosides
3 - (i) rudimentary (ii) anatomical
4 (B) - (i) water vapour, (ii) amino acids,
Explanation:
Darwin gave the theory of natural selection, which states that evolutionary change comes through the production of variation in each generation. Wing of butterfly and birds look a like and are the results of convergent evolution. According to Darwin evolution took place due to small variations and Survival of the fittest.
AIPMT (Mains)-2010
Evolution
184886
Which one of the following scientist's name is correctly matched with the theory put forth by him?
1 Weismann-Theory of Continuity of Germplasm
2 Pasteur - Inheritance of Acquired Characters
3 de Vries - Natural Selection
4 Mendel - Theory of Pangenesis
Explanation:
The theory of the continuity of the germplasm was published by August Weismann (18341914) in 1886. It proposes that the contents of the reproductive cells (sperms and ova) are passed on unchanged from one generation to the next unaffected by any changes undergone by the rest of the body. Thus, it rules out any possibility of the inheritance of acquired characteristics, and become integral to Neo-Darwinian theory.
AP EAMCET-2011
Evolution
184888
How many years are considered in one minute in Geological clock?
1 \(1,87,500,000\) years
2 52,000 years
3 \(3,125,000\) years
4 1,90,000 years
Explanation:
C In the Geological clock, one minute is roughly equivalent to \(3,125,000\) years.
GUJCET-2015
Evolution
184889
The prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidizing atmosphere of present day due to the emergence of :
1 Cyanobacteria
2 Angiosperms
3 Photosynthetic bacteria
4 Eukaryotic algae
Explanation:
Cyanobacteria played an important role in the evolution of early Earth and the biosphere. They are responsible for the oxygenation of the atmosphere. They used water to get hydrogen and release oxygen into the atmosphere. Hence, the prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidizing atmosphere of present day due to the emergence of Cyanobacteria.
184882
Which of these gases was/were in prebiotic atmosphere?
1 Ammonia
2 Methane
3 Oxygen
4 both a and b
Explanation:
According to 'Oparin' and 'Haldane', ammonia and methane were the gases present in prebiotic atmosphere. The idea of the prebiotic Earth as a roiling organic "soup" with a highly reduced atmosphere of \(\mathrm{H}_{2}, \mathrm{H}_{2} \mathrm{O}\), methane \(\left(\mathrm{CH}_{4}\right)\) and ammonia \(\left(\mathrm{NH}_{3}\right)\) was first presented by Oparin. Oxygen gas was not present in the early Earth atmosphere.
WB JEE-2015
Evolution
184884
Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements:
1 - (i) convergent
2 - (i) oxygen, (ii) nucleosides
3 - (i) rudimentary (ii) anatomical
4 (B) - (i) water vapour, (ii) amino acids,
Explanation:
Darwin gave the theory of natural selection, which states that evolutionary change comes through the production of variation in each generation. Wing of butterfly and birds look a like and are the results of convergent evolution. According to Darwin evolution took place due to small variations and Survival of the fittest.
AIPMT (Mains)-2010
Evolution
184886
Which one of the following scientist's name is correctly matched with the theory put forth by him?
1 Weismann-Theory of Continuity of Germplasm
2 Pasteur - Inheritance of Acquired Characters
3 de Vries - Natural Selection
4 Mendel - Theory of Pangenesis
Explanation:
The theory of the continuity of the germplasm was published by August Weismann (18341914) in 1886. It proposes that the contents of the reproductive cells (sperms and ova) are passed on unchanged from one generation to the next unaffected by any changes undergone by the rest of the body. Thus, it rules out any possibility of the inheritance of acquired characteristics, and become integral to Neo-Darwinian theory.
AP EAMCET-2011
Evolution
184888
How many years are considered in one minute in Geological clock?
1 \(1,87,500,000\) years
2 52,000 years
3 \(3,125,000\) years
4 1,90,000 years
Explanation:
C In the Geological clock, one minute is roughly equivalent to \(3,125,000\) years.
GUJCET-2015
Evolution
184889
The prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidizing atmosphere of present day due to the emergence of :
1 Cyanobacteria
2 Angiosperms
3 Photosynthetic bacteria
4 Eukaryotic algae
Explanation:
Cyanobacteria played an important role in the evolution of early Earth and the biosphere. They are responsible for the oxygenation of the atmosphere. They used water to get hydrogen and release oxygen into the atmosphere. Hence, the prebiotic atmosphere of the earth was of a reducing nature. It was transformed into an oxidizing atmosphere of present day due to the emergence of Cyanobacteria.
