81.
The first organisms were
A
Chemoautotrophs
B
Chemoheterotrophs
C
Autotrophs
D
Eucaryotes
Answer :
Chemoheterotrophs
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82.
Peripatus is a connecting link between:
A
Mollusca and Echinodermata
B
Annelida and Arthropoda
C
Coelenterata and Porifera
D
Ctenophora and Platyhelminthes
Answer :
Annelida and Arthropoda
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83.
What is common between parrot, platypus and kangaroo?
A
Toothless jaws
B
Functional post-end tail
C
Ovoparity
D
Homeothermy
Answer :
Homeothermy
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84.
Forthcoming generation are less adaptive than their parental generation due to
A
natural selection
B
mutation
C
genetic drift
D
adaptation
Answer :
mutation
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85.
From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask
A
$$C{H_3},{H_2},N{H_4}$$ and water vapor at 800°$$C$$
B
$$C{H_4},{H_2},N{H_3}$$ and water vapor at 600°$$C$$
C
$$C{H_3},{H_2},N{H_3}$$ and water vapor at 600°$$C$$
D
$$C{H_4},{H_2},N{H_3}$$ and water vapor at 800°$$C$$
Answer :
$$C{H_4},{H_2},N{H_3}$$ and water vapor at 800°$$C$$
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86.
Dinosaurs are
A
Primitive amphinians
B
Extinct reptiles
C
Giant mammals
D
Primitive mammals
Answer :
Extinct reptiles
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87.
Among the human ancestors the brain size was more than 1000 CC in
A
Homo erectus
B
Ramapithecus
C
Homo habilis
D
Homo neanderthalensis
Answer :
Homo neanderthalensis
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88.
Homo erectus is biological name of
A
Modern man
B
Neanderthal man
C
Java man
D
Peking and Java man
Answer :
Peking and Java man
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89.
Select the correct statement from the following?
A
Fitness is the end result of the ability to adapt and get selected by nature
B
All mammals except whales and camels have seven cervical vertebrae
C
Mutations are random and directional
D
Darwinian variations are small and directionless
Answer :
Fitness is the end result of the ability to adapt and get selected by nature
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90.
Variations caused by mutation, as proposed by Hugo de Vries, are:
A
random and directional
B
random and directionless
C
small and directional
D
small and directionless
Answer :
random and directionless
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