CBSE Questions for Class 12 Medical Biology Evolution Quiz 16 - MCQExams.com

Exterme specialization and extinction of great reptiles occurred in the epoch 
  • Permian
  • Triassic
  • Jurassic
  • Cretaceous
Being all mammals, whale, dolphin, bat, monkey and horse have some. important common characters, but they also show conspicuous differences. This is due to the phenomenon of 
  • Normalisation
  • Genetic drift
  • Convergence
  • Divergence
Jurassic period belongs to era 
  • Palaeozoic
  • Mesozoic
  • Coenozoic
  • Proterozoic
Modern birds rose in 
  • Palaeozoic
  • Coenozoic
  • Mesozoic
  • Archaeozoic
Given below are assertion and reason. 
Point out if both are true with the reason being the correct explanation (A)
Both true but the reason is not a true explanation (B)
Assertion true but the reason is wrong (C)
Both are wrong (D)

Assertion.
Comparative biochemistry provides a strong evidence in favour of common ancestry of living kings. 
Reason.
The Genetic code is universal
  • A
  • B
  • C
  • D
Dinosaurs disappeared during 
  • Jurassic
  • Triassic
  • Cretaceous
  • Permian
Development of adaptations along parallel lines in unrelated groups of animals is 
  • Adaptive convergence
  • Adaptive radiation
  • Adaptive divergence
  • Adaptive induction
Origin of life occurred in
  • Carboniferous
  • Cambrian
  • Pre-cambrain
  • Ordovician
  • None of the above
Tasmanian wolf is a marsupial while wolf is a placental mammal. This is an example of
  • Convergent evolution
  • Divergent evolution
  • Inheritance of acquired characters
  • Both A and C
Mesozoic era was dominated by 
  • Birds
  • Fishes
  • Reptiles
  • Mammals
Mesozoic era is known as golden age of
  • Fishes
  • Amphibians
  • Reptiles
  • Molluscs
The forces that change the allele and genotype frequencies of a population are 
  • Recombination
  • Evolutionary agents
  • Acquired traits
  • Adaptions
The age of fishes was
  • Silurian
  • Ordovician
  • Devonian
  • Permian
Which is incorrect ?
  • J. B. S. Haldane - Law of continuity of germplasm
  • Louis Pasteur - Germ theory of disease and immunology
  • De Vries - Mutation theory
  • Lemaitre - Big bang theory
For testing Oparin's hypothesis, Stanley Miller and Harold Urey used $$ H_2 , NH_3 $$ and two other chemicals which were :
  • $$ O_2 $$ and methane
  • $$O_2 $$ and $$H_2 O $$
  • $$ CH_4 $$ and $$H_2 O $$
  • Salt and $$ H_2 O $$
Forelimbs of cat/lizard used in walking, forelimbs of whale used in swimming and forelimbs of bats used in flying are examples of 
  • Adaptive radiation
  • Homologous organs
  • Convergent evolution
  • Analogous organs
Which is correct order of increasing geological time scale for a hypothetical vertebrate evolution?
  • Cenozoic, mesozoic, palaeozoic, precambrian
  • Cenozoic, palaeozoic, mesozoic, precambrain
  • Precambrian, cenozoic, palaeozoic, mesozoic
  • Precambrian, palaeozoic, mesozoic cenozoic
Mass extinction at the end of mesozoic era was probably caused by 
  • Continental drift
  • Massive glaciation
  • Collision of earth with large meteorite
  • Change in earth's orbit
That mammals are found in ........... period in ........... era 
  • Permian, Palaeozoic
  • Triassic, Mesozoic
  • Tertiary, Cenozoic
  • None of these
Oparin-Haldane's view on the origin of life was first experimentally proved by :
  • Malthus
  • Plato
  • Louis Pasteur
  • Stanley Miller
Experimental proof that organic compounds formed the basis of evolution was given by :
  • Oparin
  • Pasteur
  • Nucleic acids
  • Nucleoproteins
The drama of human evolution was dramatised in 
  • Asia and Java
  • China and Asia
  • Africa and Java
  • Asia and Africa
There are two opposing views about the origin of modern man. According to one view, Homo erectus in Asia was the ancestor of modem man. A study of variations of DNA, however, suggested African origin of modern man. What kind of observation on DNA variations could suggest this
  • Greater variation in Asia than in Africa
  • Greater variation in Africa than in Asia
  • Similar variation in Africa and Asia
  • Variation only in Asia and no variation in Africa
Prehistoric man who gave a proper burial . to the dead for the first time was
  • Peking Man
  • Java Man
  • Neanderthal Man
  • Cro-Magnon Man
Fossils of CroMagnon Man were discovered in
  • 1924
  • 1891
  • 1868
  • 1856
Which is the most recent in human evolution? 
  • Mesolithic
  • Upper palaeolithic
  • Neolithic
  • Middle palaeolithic
Human ancestors first to build hunts and wear animal hides were
  • Peking Man
  • Java Man
  • Cro-Magnon Man
  • Neanderthal Man
Name given to fossil hominid of Shivalik hills in India is
  • Ramapithecus
  • Australopithecus
  • Pithecanthropus
  • Indratherium
Which one is correct 
  • Cro-Magnon is real ancestor of man
  • Homo eredus is real ancestor of man
  • Neanderthal man is direct ancestor Homo sapiens
  • Ramapithecus is real ancestor of man 
Which of the following is correct regarding evolution of mankind? 
  • Homo erectus was preceded by Homo habitue.
  • Australopithecus lived in Australia.
  • Neanderthal Man and Cro-Magnon man lived together.
  • None of the above.
The epoch of human civilization is 
  • Pliocene
  • Holocene
  • Pleistocene
  • Palaeocene
Concept of life forms was given by
  • Weaver
  • Clements
  • Raunkier
  • Turesson
Hardy-Weinberg equilibrium is influenced by gene flow, genetic drift, mutation, genetic recombination and :
  • Evolution
  • Limiting factor
  • Over-production
  • Natural selection
  • Saltation
Any change in the gene pool or allele frequencies present in a population results in :
  • Evolution
  • Deletion
  • Gene mutation
  • Polymorphism
In a Hardy-Weinberg population, the frequency of allele A of gene A $$ a $$ is 0.What is the frequency of allele $$a$$?
  • 0.6
  • 0.48
  • 0.16
  • 0.36
Choose the wrong statement regarding Hardly-Weinberg principle :
  • Allele frequencies in a population are stable and constant from generation to generation.
  • Sum total of all the allelic frequencies in a population is 1.
  • Variation due to genetic drift results in changed frequency of genes and alleles in future generations.
  • Natural selection can lead to stabilisation, directional change or disruption.
  • Genetic recombination helps in maintaining Hardy-Weinberg equilibrium.
According to Hardy-Weinberg equilibrium, the allelic frequencies in a population will remain constant from generation to generation under which of the two conditions?
(a) Large population size
(b) Non-random mating
(c) There should be differential success among the organisms of the poppulation
(d) There should be no mutation or large scale migrations
  • (a) and (b)
  • (b) and (c)
  • (a) and (c)
  • (a) and (d)
What is correct 'sequence of Man, taxonomically starting from super family to subfamily
  • Hominoidea, hominidae, homininae
  • Homininae, Hominoidea, hominidae
  • Hominidae, homoninae, Hominoidea
  • Hominoidea, homininae, hominidae
Read the statements (i-iv) and choose the correct option:
i.   Increase in melanized moths after industrialization in Great Britain is a proof of Natural Selection.
ii.  More individuals acquiring mean character value cause disruption.
iii. Change in allelic frequency leads to Hardy-Weinberg equilibrium.
iv. Genetic drift changes allelic frequency in future generations.
  • ii is correct
  • iv is correct
  • i and iv are correct
  • ii and iv are correct
Which of these are examples of evolution by anthropogenic action?
(i) Adaptive radiation of marsupials of Australia.
(ii) Appearance of antibiotic resistant microbes.
(iii) Evolution of finches in Galapagos islands.
(iv) Appearance of dark winged moth in England during post industrialisation period.
(v) Convergent evolution of placental mammals in Australia.
  • (i) and (ii)
  • (v) only
  • (ii) only
  • (ii) and (iv) only
  • (iii) and (v) only
A well preserved and most complete homonid fossil named Lucy belongs to genus
  • Dryopithecus
  • Oreopithecus
  • Pithecanthropus
  • Australopithecus
Choose the correct answers from the alternatives given .
Which of the following groups of birds is correctly matched with the islands on which these birds underwent an adaptive radiation?
  • Penguins; Aleutian islands
  • Honeycreepers; Hawaiian islands
  • Sparrows; Bahamas
  • Jays; Falkland islands
Following are the two statements regarding the origin of life.
I. The earliest organisms that appeared on the earth were non-green and presumably anerobes.
II. The first autotrophic organisms were the chemoautotrophs that never released oxygen.
Of the above statements which one of the following options is correct?
  • II is correct, but I is false
  • Both I and II are correct
  • Both I and II are false
  • I is correct, but II is false
Choose the correct answers from the alternatives given .
Through study of the geologic record, we know that the evolution of life has been profoundly influenced by
  • bombardment of the Earth by celestial objects
  • profound shifts in land masses, shorelines, and oceans
  • physical and chemical evolution of the Earth
  • all of the above
Two zoogeographical regions separated by high mountain ranges _______________.
  • Oriental and Australian
  • Palaearctic and Oriental
  • Nearctic and Palaearctic
  • Neotropical and Ethiopian
Theory of special creation does not believe in :
  • Changeable flora and fauna
  • Constant diversity
  • Unchangeable forms of organism
  • 4000 years old earth
Choose the correct answers from the alternatives given .
The many species of Galapagos finches were each adapted to eating different foods. This is an example. of
  • Sympatric speciation
  • Adaptive radiation
  • Gene flow
  • All of these
A human population containing $$200$$ individuals has two alleles at the 'T' locus, named T & t. T, which produces tall individuals, is dominant over t, which produces short individuals. If the population has $$90$$ TT, $$40$$ Tt, and $$70$$ tt genotypes, what will be the frequencies of these two alleles in this population?
  • $$T, 0.50; t, 0.50$$
  • $$T, 0.55; t, 0.45$$
  • $$T, 0.45; t, 0.35$$
  • $$T, 0.90; t, 0.10$$
Choose the correct answers from the alternatives given.
Evolution of a new species by events that involve its splitting from an ancestral species can occur via
  • allopatric speciation
  • cladistic speciation
  • instantaneous speciation
  • all of these
Which of the following isotopes is used for finding the fossil age maximum about $$35,0000$$ years?
  • $$^{238}U$$
  • $$^{14}C$$
  • $$^{3}H$$
  • $${206}Pb$$
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