Which of the following eras, in geological time- scale, corresponds to the period when life had not originated on the earth?
azoic
mesozoic
palaeozoic
archaeozoic
Primitive earth atmosphere consisted of H2O, NH3, H2 and
Oxygen
Nitrogen
Methane
Carbon dioxide
The abiogenesis occurred about how many billion years ago?
1.2 billion
1.5 billion
2.5 billion
3.5 billion
The theory of pangenesis was introduced by
Darwin
Lamarck
Oparin
Hugo de Vries
A coacervate containing nucleo- protein and surrounded by several nutritive substance is called
pre-cell
postcell
precoacervate
postcoacervate
The presence of gill slits, in the embryos of all vertebrates, supports the theory of
biogenesis
recapitulation
metamorphosis
organic evolution
Which of the following were the first living forms?
eobiont
eukaryotes
prokaryotes
coacervates
According to one of the accepted theories, primitive earth's atmosphere consisted of water, ammonia, hydrogen and
CH4
N2
O2
CO2
The simple organic compounds in the evolution of life on the earth, must have
urea and amino acids
urea and nucleic acids
protein and amino acids
protein and nucleic acids
According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?
hydrogen
methane
oxygen
water vapor
