NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Evolution
184824
Origin of life occurred in
1 Precambrian
2 Coenozoic
3 Palaeozoic
4 Mesozoic
Explanation:
Origin of life occurred Precambrian. Precambrian is the earliest part of Earth's history, set before the current phanerozoic. The Precambrian is so named because it preceeded the Cambrian the first period of the phanerozoic Eon. It was the " Age of early life". During the pre Cambrian, continents formed and our modern atmosphere developed, which early life evolved and flourished. Soft bodied creatures like worms and jelly -fish lived in the world's oceans but the land remained barren.
Uttarakhand PMT-2009 / BVP-2009
Evolution
184825
Miller and Urey performed an experiment to prove the origin of life. They took gases \(\mathbf{N H}_{3}\), and \(\mathrm{H}_{2}\) alongwith
1 \(\mathrm{N}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{H}_{2} \mathrm{O}\) and \(\mathrm{CH}_{4}\)
3 \(\mathrm{CH}_{4}\) and \(\mathrm{N}_{2}\)
4 \(\mathrm{CO}_{2}\) and \(\mathrm{NH}_{3}\)
Explanation:
Stanley Miller (in 1953) who was then a graduate student of Harold Urey at the university of Chicago, demonstrated it clearly that ultra-violet radiation or electrical discharges or heat or a combination of these produce complex organic compounds from a mixture of methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), water \(\left(\mathrm{H}_{2} \mathrm{O}\right)\) i.e. steam of water and hydrogen. Miller circulated four gases, methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), hydrogen \(\left(\mathrm{H}_{2}\right)\), and water vapour in an air tight apparatus and passed electrical discharges from electrodes at \(800^{\circ} \mathrm{C}\). He passed the mixture through a condenser. He circulated the gases continuously in this way for one week and then analysed the chemical composition of the liquid inside the apparatus. He found a large number of simple organic compounds including some amino acids such as alanine, glycine, and aspartic acid. Miller proved that organic compounds were basis of life.
Rajasthan PMT-2006
Evolution
184826
First organisms to evolve on the earth were
1 saprotrophs
2 photoautotrophs
3 chemoautotrophs
4 chemoheterotrophs
Explanation:
First organisms to evolve on the earth were chemoheterotrophs. Chemoheterotrophs are microbes that use organic chemical substances as sources of energy and organic compounds as the main source of carbon. Most animals and fungi are example of chemoheterotrophs, as are halophiles.
184827
Which of the following was formed in S. Millers experiment?
1 Amino acids
2 Nucleic acids
3 UV radiations
4 Microspheres
Explanation:
Amino acid was formed in S.L millers experiment. Miller synthesized organic compounds under conditions resembling the primitive atmosphere of the earth, a mixture of water vapour, methane, hydrogen and ammonia was circulated through a closed apparatus by steam from boiling water and subjected to an electric spark discharge between tungsten electrodes. This apparatus was permitted to run for a weak. The result was several amino acid.
Origin of life occurred Precambrian. Precambrian is the earliest part of Earth's history, set before the current phanerozoic. The Precambrian is so named because it preceeded the Cambrian the first period of the phanerozoic Eon. It was the " Age of early life". During the pre Cambrian, continents formed and our modern atmosphere developed, which early life evolved and flourished. Soft bodied creatures like worms and jelly -fish lived in the world's oceans but the land remained barren.
Uttarakhand PMT-2009 / BVP-2009
Evolution
184825
Miller and Urey performed an experiment to prove the origin of life. They took gases \(\mathbf{N H}_{3}\), and \(\mathrm{H}_{2}\) alongwith
1 \(\mathrm{N}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{H}_{2} \mathrm{O}\) and \(\mathrm{CH}_{4}\)
3 \(\mathrm{CH}_{4}\) and \(\mathrm{N}_{2}\)
4 \(\mathrm{CO}_{2}\) and \(\mathrm{NH}_{3}\)
Explanation:
Stanley Miller (in 1953) who was then a graduate student of Harold Urey at the university of Chicago, demonstrated it clearly that ultra-violet radiation or electrical discharges or heat or a combination of these produce complex organic compounds from a mixture of methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), water \(\left(\mathrm{H}_{2} \mathrm{O}\right)\) i.e. steam of water and hydrogen. Miller circulated four gases, methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), hydrogen \(\left(\mathrm{H}_{2}\right)\), and water vapour in an air tight apparatus and passed electrical discharges from electrodes at \(800^{\circ} \mathrm{C}\). He passed the mixture through a condenser. He circulated the gases continuously in this way for one week and then analysed the chemical composition of the liquid inside the apparatus. He found a large number of simple organic compounds including some amino acids such as alanine, glycine, and aspartic acid. Miller proved that organic compounds were basis of life.
Rajasthan PMT-2006
Evolution
184826
First organisms to evolve on the earth were
1 saprotrophs
2 photoautotrophs
3 chemoautotrophs
4 chemoheterotrophs
Explanation:
First organisms to evolve on the earth were chemoheterotrophs. Chemoheterotrophs are microbes that use organic chemical substances as sources of energy and organic compounds as the main source of carbon. Most animals and fungi are example of chemoheterotrophs, as are halophiles.
184827
Which of the following was formed in S. Millers experiment?
1 Amino acids
2 Nucleic acids
3 UV radiations
4 Microspheres
Explanation:
Amino acid was formed in S.L millers experiment. Miller synthesized organic compounds under conditions resembling the primitive atmosphere of the earth, a mixture of water vapour, methane, hydrogen and ammonia was circulated through a closed apparatus by steam from boiling water and subjected to an electric spark discharge between tungsten electrodes. This apparatus was permitted to run for a weak. The result was several amino acid.
Origin of life occurred Precambrian. Precambrian is the earliest part of Earth's history, set before the current phanerozoic. The Precambrian is so named because it preceeded the Cambrian the first period of the phanerozoic Eon. It was the " Age of early life". During the pre Cambrian, continents formed and our modern atmosphere developed, which early life evolved and flourished. Soft bodied creatures like worms and jelly -fish lived in the world's oceans but the land remained barren.
Uttarakhand PMT-2009 / BVP-2009
Evolution
184825
Miller and Urey performed an experiment to prove the origin of life. They took gases \(\mathbf{N H}_{3}\), and \(\mathrm{H}_{2}\) alongwith
1 \(\mathrm{N}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{H}_{2} \mathrm{O}\) and \(\mathrm{CH}_{4}\)
3 \(\mathrm{CH}_{4}\) and \(\mathrm{N}_{2}\)
4 \(\mathrm{CO}_{2}\) and \(\mathrm{NH}_{3}\)
Explanation:
Stanley Miller (in 1953) who was then a graduate student of Harold Urey at the university of Chicago, demonstrated it clearly that ultra-violet radiation or electrical discharges or heat or a combination of these produce complex organic compounds from a mixture of methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), water \(\left(\mathrm{H}_{2} \mathrm{O}\right)\) i.e. steam of water and hydrogen. Miller circulated four gases, methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), hydrogen \(\left(\mathrm{H}_{2}\right)\), and water vapour in an air tight apparatus and passed electrical discharges from electrodes at \(800^{\circ} \mathrm{C}\). He passed the mixture through a condenser. He circulated the gases continuously in this way for one week and then analysed the chemical composition of the liquid inside the apparatus. He found a large number of simple organic compounds including some amino acids such as alanine, glycine, and aspartic acid. Miller proved that organic compounds were basis of life.
Rajasthan PMT-2006
Evolution
184826
First organisms to evolve on the earth were
1 saprotrophs
2 photoautotrophs
3 chemoautotrophs
4 chemoheterotrophs
Explanation:
First organisms to evolve on the earth were chemoheterotrophs. Chemoheterotrophs are microbes that use organic chemical substances as sources of energy and organic compounds as the main source of carbon. Most animals and fungi are example of chemoheterotrophs, as are halophiles.
184827
Which of the following was formed in S. Millers experiment?
1 Amino acids
2 Nucleic acids
3 UV radiations
4 Microspheres
Explanation:
Amino acid was formed in S.L millers experiment. Miller synthesized organic compounds under conditions resembling the primitive atmosphere of the earth, a mixture of water vapour, methane, hydrogen and ammonia was circulated through a closed apparatus by steam from boiling water and subjected to an electric spark discharge between tungsten electrodes. This apparatus was permitted to run for a weak. The result was several amino acid.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Evolution
184824
Origin of life occurred in
1 Precambrian
2 Coenozoic
3 Palaeozoic
4 Mesozoic
Explanation:
Origin of life occurred Precambrian. Precambrian is the earliest part of Earth's history, set before the current phanerozoic. The Precambrian is so named because it preceeded the Cambrian the first period of the phanerozoic Eon. It was the " Age of early life". During the pre Cambrian, continents formed and our modern atmosphere developed, which early life evolved and flourished. Soft bodied creatures like worms and jelly -fish lived in the world's oceans but the land remained barren.
Uttarakhand PMT-2009 / BVP-2009
Evolution
184825
Miller and Urey performed an experiment to prove the origin of life. They took gases \(\mathbf{N H}_{3}\), and \(\mathrm{H}_{2}\) alongwith
1 \(\mathrm{N}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{H}_{2} \mathrm{O}\) and \(\mathrm{CH}_{4}\)
3 \(\mathrm{CH}_{4}\) and \(\mathrm{N}_{2}\)
4 \(\mathrm{CO}_{2}\) and \(\mathrm{NH}_{3}\)
Explanation:
Stanley Miller (in 1953) who was then a graduate student of Harold Urey at the university of Chicago, demonstrated it clearly that ultra-violet radiation or electrical discharges or heat or a combination of these produce complex organic compounds from a mixture of methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), water \(\left(\mathrm{H}_{2} \mathrm{O}\right)\) i.e. steam of water and hydrogen. Miller circulated four gases, methane \(\left(\mathrm{CH}_{4}\right)\), ammonia \(\left(\mathrm{NH}_{3}\right)\), hydrogen \(\left(\mathrm{H}_{2}\right)\), and water vapour in an air tight apparatus and passed electrical discharges from electrodes at \(800^{\circ} \mathrm{C}\). He passed the mixture through a condenser. He circulated the gases continuously in this way for one week and then analysed the chemical composition of the liquid inside the apparatus. He found a large number of simple organic compounds including some amino acids such as alanine, glycine, and aspartic acid. Miller proved that organic compounds were basis of life.
Rajasthan PMT-2006
Evolution
184826
First organisms to evolve on the earth were
1 saprotrophs
2 photoautotrophs
3 chemoautotrophs
4 chemoheterotrophs
Explanation:
First organisms to evolve on the earth were chemoheterotrophs. Chemoheterotrophs are microbes that use organic chemical substances as sources of energy and organic compounds as the main source of carbon. Most animals and fungi are example of chemoheterotrophs, as are halophiles.
184827
Which of the following was formed in S. Millers experiment?
1 Amino acids
2 Nucleic acids
3 UV radiations
4 Microspheres
Explanation:
Amino acid was formed in S.L millers experiment. Miller synthesized organic compounds under conditions resembling the primitive atmosphere of the earth, a mixture of water vapour, methane, hydrogen and ammonia was circulated through a closed apparatus by steam from boiling water and subjected to an electric spark discharge between tungsten electrodes. This apparatus was permitted to run for a weak. The result was several amino acid.