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Evolution

288 Questions Start Allen Test
All Exams Allen
Q126 Allen PYQ MCQ
In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by:-
A.
pq
B.
qĀ²
C.
pĀ²
D.
2pq
Q127 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
Q128 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
Q129 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
Q130 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
Q131 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
Q132 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
Q133 Allen PYQ Match the Columns
Match the hominids with their correct brain size:
Select the correct option.
with :
Column-IColumn-II
(A)Homo habilis
(B)Homo neanderthalensis
(C)Homo erectus
(D)Homo sapiens
(I)900 cc
(II)1350 cc
(III)650ā€“800 cc
(IV)1400 cc
A.
(A)āˆ’(III), (B)āˆ’(I), (C)āˆ’(IV), (D)āˆ’(II)
B.
(A)āˆ’(III), (B)āˆ’(II), (C)āˆ’(I), (D)āˆ’(IV)
C.
(A)āˆ’(III), (B)āˆ’(IV), (C)āˆ’(I), (D)āˆ’(II)
D.
(A)āˆ’(IV), (B)āˆ’(III), (C)āˆ’(I), (D)āˆ’(II)
Q134 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)
Q135 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
Q136 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.
Q137 Allen PYQ MCQ
Embryological support for evolution was disapproved by :
A.
Oparin
B.
Karl Ernst von Baer
C.
Alfred Wallace
D.
Charles Darwin
Q138 Allen PYQ MCQ
Flippers of Penguins and Dolphins are examples of:
A.
Natural selection
B.
Adaptive radiation
C.
Convergent evolution
D.
Industrial melanism
Q139 Allen PYQ MCQ
From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask :
A.
CHā‚ƒ, Hā‚‚, NHā‚ƒ and water vapour at $60 0 ^ { \circ } C$
B.
CHā‚„, Hā‚‚, NHā‚ƒ and water vapour at $80 0 ^ { \circ } \mathsf { C }$
C.
CHā‚ƒ, Hā‚‚, NHā‚„ and water vapour at $80 0 ^ { \circ } \mathsf { C }$
D.
$\mathsf { C H } _ { 4 } , \mathsf { H } _ { 2 } , \mathsf { N H } _ { 3 }$ and water vapour at $60 0 ^ { \circ } C$
Q140 Allen PYQ MCQ
Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action? (a) Darwin's Finches of Galapagos islands. (b) Herbicide resistant weeds. (c) Drug resistant eukaryotes. (d) Man-created breeds of domesticated animals like dogs.
A.
Only (d)
B.
Only (a)
C.
(a) and (c)
D.
(b), (c) and (d)
Q141 Allen PYQ MCQ
Embryological support for evolution was proposed by :
A.
Ernst Heckel
B.
Karl Ernst von Baer
C.
Charles Darwin
D.
Alfred Wallace
Q142 Allen PYQ MCQ
After about how many years of formation of earth, life appeared on this planet ?
A.
500 billion years
B.
50 million years
C.
500 million years
D.
50 billion years
Q143 Allen PYQ MCQ
The phenomenon of evolution of different species in a given geographical area starting from a point and spreading to other habitats is called :-
A.
Saltation
B.
Co-evolution
C.
Natural selection
D.
Adaptive radiation
Q144 Allen PYQ MCQ
A Hominid fossil discovered in Java in 1891, now extinct, having cranial capacity of about 900 cc was:
A.
Homo erectus
B.
Neanderthal man
C.
Homo sapiens
D.
Australopithecus
Q145 Allen PYQ MCQ
The factor that leads to Founder effect in a population is:
A.
Natural selection
B.
Genetic recombination
C.
Mutation
D.
Genetic drift
Q146 Allen PYQ Match the Columns
Match Column-I with Column-II. Choose the coorect answr from the options given below :
with :
Column-IColumn-II
(A)Adaptive radiation
(B)Convergent evolution
(C)Divergent evolution
(D)Evolution by anthropogenic action
(I)Selection of resistant varieties due to excessive use of herbicides and pesticides
(II)Bones of forelimbs in Man and Whale
(III)Wings of Butterfly and Bird
(IV)Darwin Finches
A.
A-IV, B-III, C-II, D-I
B.
A-III, B-II, C-I, D-IV
C.
A-II, B-I, C-IV, D-III
D.
A-I, B-IV, C-III, D-II
Q147 Allen PYQ MCQ
Natural selection where more individuals acquire specific character value other than the mean character value, leads to :-
A.
Directional change
B.
Disruptive change
C.
Random change
D.
Stabilising change
Q148 Allen PYQ MCQ
Which of the following statements is not true?
A.
Sweet potato and potato is an example of analogy
B.
Homology indicates common ancestry
C.
Flippers of penguins and dolphins are a pair of homologous organs
D.
Analogous structures are a result of convergent evolution
Q149 Allen PYQ MCQ
Panspermia, an idea that is still a favourite for some astronomers, means :
A.
Creation of life from dead and decaying matter.
B.
Creation of life from chemicals.
C.
Origin of sperm in human testes.
D.
Transfer of spores as unit of life from other planets of Earth.
Q150 Allen PYQ MCQ
Select the correct statement regarding mutation theory of evolution.
A.
This theory was proposed by Alfred Wallace.
B.
Variations are small directional changes.
C.
Single step large mutation is a cause of speciation.
D.
Large differences due to mutations arise gradually in a population.