231.
Theory of Natural selection dwells on
A
role of environment in evolution
B
natural selection acting on favourable variations
C
changes in gene complex resulting in heritable variations
D
none of these
Answer :
changes in gene complex resulting in heritable variations
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232.
Life originated
A
8 billion years ago
B
6 billion years ago
C
4 billlion years ago
D
1 billion years ago
Answer :
4 billlion years ago
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233.
If a particular animal has shelled eggs, hair and teats on the body and has cloaca, it may be a connecting link between
A
Reptiles and birds
B
Birds and mammals
C
Reptiles and mammals
D
None of the above
Answer :
Reptiles and mammals
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234.
Archaeopteryx is a connecting link because
A
It possessed characters of reptiles and aves
B
It had charactes of reptiles and mammals
C
It was a reptile not a bird
D
It had characters of non chordates and chrodates
Answer :
It possessed characters of reptiles and aves
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235.
Who called larger colloidal particles of primitive sea as coacervates
A
Fox
B
Oparin
C
Empedocles
D
Haldane
Answer :
Oparin
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236.
Evolution of birds and mammals occurred in
A
Eocene and Oligocene periods
B
Silurian and Devonian periods
C
Carboniferous and Permian epochs
D
Jurasic period
Answer :
Jurasic period
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237.
Pasteur gave
A
Cellular theory
B
Recapitulation theory
C
Germ theory of disease
D
Germplasm theory
Answer :
Germ theory of disease
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238.
Which one of the following is regarded as the direct ancestor of modern man ?
A
Homo erectus
B
Ramapithecus
C
Homo habilis
D
Australopithecus
Answer :
Homo erectus
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239.
Homologous organs have
A
Similar origin and similar or dissimilar functions.
B
Dissimilar origin and structure
C
Dissimilar origin and function
D
Dissimilar origin and similar functions
Answer :
Similar origin and similar or dissimilar functions.
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240.
Darwin's finches are a good example of:
A
Industrial melanism
B
Connecting link
C
Adaptive radiation
D
Convergent evolution
Answer :
Adaptive radiation
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