21.
de Vries gave his mutation theory on organic evolution while working on:
A
Pisum sativum
B
Drosophila melanogaster
C
Oenothera lamarckiana
D
Althea rosea
Answer :
Oenothera lamarckiana
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22.
Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution ?
A
Discontinuous variations
B
Parasites and predators as natural enemies
C
Survival of the fittest
D
Struggle for existence
Answer :
Discontinuous variations
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23.
It is belived that the first organisms which inhabitated earth's surface were
A
Autotrophs
B
Mixotrophs
C
Heterotrophs
D
Chromatotrophs
Answer :
Heterotrophs
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24.
Which of the following organ in man is not vestigial
A
Vermiform appendix
B
Nictitating membrane
C
Ear muscles
D
Epiglottis
Answer :
Epiglottis
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25.
Which is not a vestigial part in humans?
A
Segmental muscles of abdomen
B
Finger nails
C
Third molar
D
Coccyx
Answer :
Finger nails
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26.
Theory of inheritance of acquired characters was given by
A
Wallace
B
Lamarck
C
Darwin
D
De Vries
Answer :
Lamarck
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27.
Fossils are dated by
A
Amount of calcium residue
B
Amount of radioactive carbon compound
C
Associationm with other mammals
D
Structure of bones
Answer :
Amount of radioactive carbon compound
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28.
Which compounds were formed in the direction of the origin of life
A
Urea, nucleic-acid
B
Urea, amino-acid
C
Proteins, nucleic-acid
D
Protein, amino-acid
Answer :
Proteins, nucleic-acid
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29.
Which of the following was not found in free form during origin of life
A
Ammonia
B
Methane
C
Oxygen
D
Hydrogen
Answer :
Oxygen
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30.
Which is a correct match
A
Darlington-DNA replication
B
Mendel-mutation
C
Morgan-father of genetics
D
De Vries-Oenothera lamarckiana
Answer :
De Vries-Oenothera lamarckiana
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