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Evolution

288 Questions Start Allen Test
All Exams Allen
Q276 Allen ANALYTICAL QUESTIONS MCQ
The most apparent change during the evolutionary history of Homo sapiens is traced in: -
A.
Walking upright
B.
Shortening of jaws
C.
Remarkable increase in the brain size
D.
Loss of body hair
Q277 Allen ANALYTICAL QUESTIONS MCQ
Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements:
Statements:
(A) Wings of butterfly and birds look alike and are the results of ________(i)________ evolution
(B) Miller showed that CHā‚„, Hā‚‚, NHā‚ƒ and ________(i)________, when exposed to electric discharge in flask resulted in formation of______(ii)______
(C) Vermiform appendix is a ______(i)________organ and an ______(ii)________evidence of evolution.
(D) According to Darwin evolution took place due to _____(i)______ and________
(ii)________of the fittest.
A.
(A) āˆ’ (i) convergent (B) ā€“ (i) oxygen, (ii) nucleosides
B.
(B) ā€“ (i) water vapour, (ii) amino acids, (C) ā€“ (i) rudimentary (ii) chemical
C.
(C) ā€“ (i) vestigial, (ii) anatomical, (D) ā€“ (i) mutations, (ii) multiplication
D.
(D) ā€“ (i) small variations, (ii) survival, (A) ā€“ (i) convergent
Q278 Allen ANALYTICAL QUESTIONS MCQ
What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?
A.
Upright posture
B.
Shortening of jaws
C.
Binocular vision
D.
Increasing brain capacity
Q279 Allen ANALYTICAL QUESTIONS MCQ
Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as: -
A.
Migration
B.
Divergent evolution
C.
Adaptive radiation
D.
Natural selection
Q280 Allen ANALYTICAL QUESTIONS MCQ
What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?
A.
Increasing cranial capacity
B.
Upright posture
C.
Shortening of jaws
D.
Binocular vision
Q281 Allen ANALYTICAL QUESTIONS MCQ
The extinct human who lived 1,00,000 to 40,000 years ago, in Europe, Asia and parts of Africa, with short stature, heavy eye brows, retreating fore heads, large jaws with heavy teeth, stocky bodies, a lumbering gait and stooped posture was :-
A.
Cro-Magnons humans
B.
Ramapithecus
C.
Homo habilis
D.
Neanderthal human
Q282 Allen ANALYTICAL QUESTIONS MCQ
Which one of the following options gives one correct example each of convergent evolution and divergent evolution?
A.
Convergent evolution-Bones of forelimbs of vertebrates, Divergent evolution-Wings of butterfly and birds
B.
Convergent evolution-Thorns of Bougainvillea and tendrils of Cucurbita, Divergent evolution-Eyes of Octopus and Mammals
C.
Convergent evolution-Eyes of octopus and mammals, Divergent evolution-Bones of forelimbs of vertebrates
D.
Convergent evolution-Thorns of Bougainvillea and tendrils of Cucurbita ,Divergent evolution-Wings of butterflies and birds
Q283 Allen ANALYTICAL QUESTIONS MCQ
The idea of mutations was brought forth by:
A.
Hardy Weinberg, who worked on allele frequencies in a population
B.
Charles Darwin, who observed a wide variety of organisms during sea voyage
C.
Hugo do Vries, who worked on evening primrose
D.
Gregor Mendel, who worked on Pisum sativum
Q284 Allen ANALYTICAL QUESTIONS MCQ
The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of:
A.
Analogous organs that have evolved due to divergent evolution.
B.
Homologous organs that have evolved due to convergent evolution.
C.
Homologous organs that have evolved due to divergent evolution.
D.
Analogous organs that have evolved due to convergent evolution.
Q285 Allen ANALYTICAL QUESTIONS MCQ
The tendency of population to remain in genetic equilibrium may be disturbed by:
A.
lack of random mating
B.
random mating
C.
lack of migration
D.
lack of mutations
Q286 Allen ANALYTICAL QUESTIONS MCQ
The process by which organisms with different evolutionary history evolve similar phenotypic adaptation in response to a common environmental challenge, is called:
A.
Adaptive radiation
B.
Natural selection
C.
Convergent evolution
D.
Non-random evolution
Q287 Allen ANALYTICAL QUESTIONS MCQ
According to Darwin, the organic evolution is due to:
A.
Reduced feeding efficiency in one species due to the presence of interfering species
B.
Intraspecific competition
C.
Interspecific competition
D.
Competition within closely related species
Q288 Allen ANALYTICAL QUESTIONS MCQ
Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as:
A.
Genetic load
B.
Genetic flow
C.
Genetic drift
D.
Random mating