Q451
Allen
PYQ
MCQ
Which of the following had the smallest brain capacity?
A.
Homo sapiens
B.
Homo neanderthalensis
C.
Homo habilis
D.
Homo erectus
Q452
Allen
PYQ
MCQ
Which is the most common mechanism of genetic variation in the population of sexually reproducing organism?
A.
Chromosomal aberrations
B.
Genetic drift
C.
Recombination
D.
Transduction
Q453
Allen
PYQ
MCQ
A population will not exist in Hardy - Weinberg equilibrium if :-
A.
There are no mutations
B.
There is no migration
C.
The population is large
D.
Individuals mate selectively
Q454
Allen
PYQ
MCQ
The wings of a bird and the wings of an insect are:
A.
homologous structures and represent convergent evolution
B.
homologous structures and represent divergent evolution
C.
analogous structures and represent convergent evolution
D.
phylogenetic structures and represent divergent evolution
Q455
Allen
PYQ
MCQ
Industrial melanism is an example of:
A.
Neo Lamarckism
B.
Neo Darwinism
C.
Natural selection
D.
Mutation
Q456
Allen
PYQ
MCQ
Which the following are most suitable indicators of ${ \mathsf { S } } { \mathsf { O } } _ { 2 }$ pollution in the environment?
A.
Fungi
B.
Lichens
C.
Conifers
D.
Algae
Q457
Allen
PYQ
MCQ
Which of the following structure is homologous to the wing of a bird?
A.
Dorsal fin of a Shark
B.
Wing of a Moth
C.
Hind limb of Rabbit
D.
Flipper of Whale
Q458
Allen
PYQ
MCQ
Analogous structures are a result of: -
A.
Divergent evolution
B.
Convergent evolution
C.
Shared ancestry
D.
Stabilizing selection
Q459
Allen
PYQ
MCQ
Following are the two statements regarding the origin of life: - (a) The earliest organisms that appeared on the earth were non-green and presumably anaerobes. (b) The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of the following options is correct?
A.
(a) is correct but (b) is false.
B.
(b) is correct but (a) is false.
C.
Both (a) and (b) are correct.
D.
Both (a) and (b) are false.
Q460
Allen
PYQ
MCQ
Genetic drift operates in:
A.
Non-reproductive population
B.
Slow reproductive population
C.
Small isolated population
D.
Large isolated population
Q461
Allen
PYQ
MCQ
In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by:-
A.
pq
B.
${ \mathsf { q } } ^ { 2 }$
C.
${ \mathsf p } ^ { 2 }$
D.
2pq
Q462
Allen
PYQ
MCQ
The chronological order of human evolution from early to the recent is: -
A.
Ramapithecus ā Homo habilis ā Australopithecus ā Homo erectus
B.
Australopithecus ā Homo habilis ā Ramapithecus ā Homo erectus
C.
Australopithecus ā Ramapithecus ā Homo habilis ā Homo erectus
D.
Ramapithecus ā Australopithecus ā Homo habilis ā Homo erectus
Q463
Allen
PYQ
MCQ
Which of the following is the correct sequence of events in the origin of life?
I. Formation of protobionts
II. Synthesis of organic monomers
III. Synthesis of organic polymers
IV. Formation of DNA-based genetic systems
A.
II, III, I, IV
B.
II, III, IV, I
C.
I, II, III, IV
D.
I, III, II, IV
Q464
Allen
PYQ
MCQ
Genetic drift operates in :-
A.
Non-reproductive population
B.
Slow reproductive population
C.
Small isolated population
D.
Large isolated population
Q465
Allen
PYQ
MCQ
In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by:-
A.
pq
B.
qĀ²
C.
pĀ²
D.
2pq
Q466
Allen
PYQ
MCQ
Artificial selection to obtain cows yielding higher milk output represents:
A.
Directional as it pushes the mean of the character in one direction
B.
Disruptive as it splits the population into two, one yielding higher output and the other lower output
C.
Stabilizing followed by disruptive as it stabilizes the population to produce higher yielding cows
D.
Stabilizing selection as it stabilizes this character in the population
Q467
Allen
PYQ
MCQ
The similarity of bone structure in the forelimbs of many vertebrates is an example of:
A.
Homology
B.
Analogy
C.
Convergent evolution
D.
Adaptive radiation
Q468
Allen
PYQ
MCQ
Among the following sets of examples for divergent evolution, select the incorrect option:-
A.
Forelimbs of man, bat and cheetah
B.
Heart of bat, man and cheetah
C.
Brain of bat, man and cheetah
D.
Eye of octopus, bat and man
Q469
Allen
PYQ
MCQ
According to Hugo de Vries, the mechanism of evolution is:
A.
Multiple step mutations
B.
Saltation
C.
Phenotypic variations
D.
Minor mutations
Q470
Allen
PYQ
MCQ
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
Q471
Allen
PYQ
MCQ
In a species, the weight of new-born ranges from 2 to 5 kg. 97% of the new-born with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place?
A.
Directional Selection
B.
Stabilizing Selection
C.
Disruptive Selection
D.
Cyclical Selection
Q472
Allen
PYQ
Match the Columns
Match the hominids with their correct brain size:
Select the correct option.
with :
Select the correct option.
with :
| Column-I | Column-II | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
A.
(A)ā(III), (B)ā(I), (C)ā(IV), (D)ā(II)
B.
(A)ā(III), (B)ā(II), (C)ā(I), (D)ā(IV)
C.
(A)ā(III), (B)ā(IV), (C)ā(I), (D)ā(II)
D.
(A)ā(IV), (B)ā(III), (C)ā(I), (D)ā(II)
Q473
Allen
PYQ
MCQ
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4 then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population ?
A.
0.36 (AA); 0.48(Aa); 0.16 (aa)
B.
0.16 (AA); 0.24 (Aa); 0.36 (aa)
C.
0.16 (AA); 0.48 (Aa); 0.36 (aa)
D.
0.16 (AA); 0.36 (Aa); 0.48 (aa)
Q474
Allen
PYQ
MCQ
In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as:
A.
Adaptive Radiation
B.
Divergent Evolution
C.
Cyclical Evolution
D.
Convergent Evolution
Q475
Allen
PYQ
MCQ
Which of the following statements is correct about the origin and evolution of men?
A.
Agriculture came around 50,000 years back.
B.
The Dryopithecus and Ramapithecus primates existing 15 million years ago, walked like men.
C.
Homo habilis probably ate meat.
D.
Neanderthal men lived in Asia between 1,00,000 and 40,000 years back.