Life cannot originate from inorganic matter now because ____.
Life cannot originate from inorganic matter now because the temperature is too less and there is too much oxygen. The raw materials and UV radiation are still available.
The source of energy available on primitive earth was ____.
The main source of energy available on primitive earth was UV Light and heat energy.
The atmosphere of primitive earth consisted of ____.
The atmosphere of primitive earth consisted of water, ammonia, methane and hydrogen. Ozone and oxygen were gasses which were added up later.
Louis Pasteur ____.
Louis Pasteur disproved the theory of spontaneous generation.
The theory that formation of life was preceded by chemical evolution was given by ____.
The theory that life could have come from pre-existing non-living molecules and that formation of life was preceded by chemical evolution was given Oparin and Haldane.
Natural selection is done by human beings.
In a real sense, only nature selects the best adapted varieties to survive and reproduce. This process is known as natural selection.
Organic evolution is ____.
Organic evolution is a continuous process of generation and shaping of diversity in any species.
Farmers choose cauliflower for its ____.
Cauliflower is chosen for its sterile flowers.
____ slows down the action of decomposers during the formation of fossils.
Sand and silt cover the remains of plants and animals. They slow down the action of decomposers, thereby slowing down the process of fossilization.
There is a little diversity in human forms and features across the planet.
The diversity is great in human forms through speciation. Speciation is a process that results in diversity, by expansion of different species in humans.
The continent from where most of the fossils of primitive man have been discovered is ____.
The continent from where most of the fossils of primitive man have been discovered is Africa.
Evolution of man occurred because the ape-like ancestors had ____.
Evolution of man occurred because the ape-like ancestors had development of brain.
The organism which shows close relationship to man is ____.
The organism which shows close relationship to man is Chimpanzee.
The fossil man which stood first is ____.
The fossil man whom stood first is Java ape man or Homo erectus.
There is no real ‘progress’ in the idea of evolution.
Evolution is the process of change in the inherited traits of a population of organisms from one generation to the next. Hence, there is no diversity or progress seen in evolution.
____ is Palaeontology.
Study of fossils or preserved remains of plants and animals is called Palaeontology.
The source of energy for Miller’s experiment was ____.
The source of energy for Miller’s experiment was Electric discharge.
The correct sequence in the evolution of Homo sapiens is ____.
The correct sequence in the evolution of Homo sapiens is Ramapithecus, Australopithecus, Homo habilis, Homo erectus and Homo sapiens.
The basic event in evolution is ____.
DNA is the basic genetic material that is subjected to change during reproduction and is the most basic event in evolution.
Extinct forms like dinosaurs are better understood by ____.
Fossils are the documentary evidences of organic evolution.
First Hominids were ____.
First Hominids were Ramapithecus.
Match the organisms with their cranial capacity of brain: 1. Homo erectus A. 650-1000 cc 2. Homo habilis B.900 cc 3. Neanderthal man C. 1400 cc
The correct match is 1. Homo habilis A. 650-1000cc 2. Homo erectus B. 900cc 3. Neanderthal man C. 1400cc
The fossils of Australopithecus probably lived in the grasslands of ____.
The fossils of Australopithecus probably lived in the grasslands of Africa. Australopithecus means southern man.
The feature which is not in the direction of evolution of human species is ____.
The feature which is not in the direction of evolution of human species is raised orbital ridges. With evolution the orbital ridges have become less protruding. The rest of the features are in the direction of human evolution.
It has been demonstrated experimentally that organic monomers could ____.
It has been demonstrated experimentally that organic monomers could have formed from particular gases of the primitive atmosphere. It could not have formed as a result of photosynthesis because chlorophyll developed much later in the process of evolution.
The gases used in spark-discharge apparatus were ____.
The gases used in spark-discharge apparatus by Miller were Hydrogen, methane and ammonia. Carbon dioxide and oxygen were not present.
In the experiment of Miller, the end products were ____.
In the experiment of Miller, the end products were amino acids. Nucleotides and nucleic acids were not formed in this experiment.
The ancestor of cauliflower, broccoli and kale is ____.
Cauliflower, broccoli and kale descended from wild cabbage.
In vitro synthesis of polypeptides in the absence of RNA was carried out by ____.
In 1953, S.L.Miller, an American scientist carried out In vitro synthesis of polypeptides in the absence of RNA.
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