CBSE Questions for Class 12 Medical Biology Evolution Quiz 13 - MCQExams.com

Which of the following must increase over geological time according to evolutionary biologists?
  • Size.
  • Complexity.
  • Speed of evolutionary processes such as mutation.
  • All of the above.
Hardy - Weinberg principle of zero evolution is based on:
  • Genetic equilibrium.
  • Random mating.
  • No migration.
  • All of the above.
Where does divergent plate boundary occur?
  • Seafloor
  • Ocean ridges
  • Basins
  • Himalayas
Select the incorrectly matched from the following:
  • Ichthyosaurs - Evolved about 300mya.
  • Stegosaurs - Horny plates on body and horned tail.
  • Fish with stout and strong fins - Coelacanth fish.
  • Sea weeds probably existed - 320mya.
The carboniferous period belongs to the era:
  • Precambrian
  • Palaeozoic
  • Cenozoic
  • Archaeozoic
The flourishing period of progymnosperm is:
  • Devonian.
  • Silurian.
  • Cretaceous.
  • Permian.
Plates move away from each other, in the
  • Transform fault boundary
  • Convergent plate boundary
  • Divergent plate boundary
  • Tectonic plates
Life on earth begins, approximately
  • 2.9 billion years ago
  • 3 billion years ago
  • 4.6 billion years ago
  • 2.6 billion years ago
Origin of first toothed birds and gymnosperms took place during which era?
  • Cretaceous
  • Triassic
  • Jurassic
  • Permian
The principle that gives the geneticists a tool to determine when evolution is occurring is
  • Chemiosmotic theory
  • Hardy-Weinberg principle
  • Malthusian principle
  • Cloning theory
The age of the fossil of Dryopithecus on the geological time scale is
  • 75 x 10$$^{6}$$ years back
  • 25 x 10$$^{6}$$ years back
  • 2.5 x 10$$^{6}$$ years back
  • 50 x 10$$^{6}$$ years back
The age of rock is calculated on the basis of
  • Types of fossils present
  • Amount of lead present
  • Amount of uranium present
  • ratio of amount of  Lead to Uranium
Hardy and Weinberg principle explains

  • Genetic equilibrium
  • Non random mating
  • Evolutionary force
  • All of the above
One of the oldest, best preserved and most complete hominid fossil commonly known as 'Lucy' belongs to the genus
  • Oreopithecus
  • Dryopithecus
  • Pithecanthropus
  • Australopithecus
The first seed plant appeared during
  • Silurian era
  • Devonian era
  • Carboniferous era
  • Cretaceous era
At a particular locus, the frequency of the 'A' allele is 0.6 and that of 'a' is 0.What would be the frequency of heterozygotes in a random mating population at equilibrium?
  • 0.24
  • 0.16
  • 0.48
  • 0.36
Match the physical evidence of evolution with the best description of that particular type of evidence.
List 1List 2
A. Fossils1. The remains of descendant organism that are studied.
B. Embryology2. Comparing and contrasting cell structures found within an organism.
C. Cytology3. Comparisons of the early development stages of an organism.
D. DNA evidence4. Comparing similarities and differences between amino acid sequences in two organisms.
  • A- 1, B- 3, C- 2, D- 4
  • A- 3, B- 1, C- 2, D- 4
  • A- 1, B- 3, C- 4, D- 2
  • A- 1, B- 2, C- 3, D- 4
During which period, amphibians were dominant?
  • Carboniferous
  • Silurian
  • Ordovician
  • Cambrian
  • Jurassic
Tasmanian wolf is a marsupial, while wolf is a placental mammal. This shows 
  • Convergent evolution
  • Divergent evolution
  • Parallelism
  • Inheritance of acquired characters
The conditions under which amino acid molecules might have been become bonded together to form the first protein molecules was suggested by 
  • Stanley Miller
  • Sidney W. Fox
  • Harold Urey
  • A. J. Oparin
Which time period is known as the 'revolutionary age'? 
  • 1st half of 19th century
  • 2nd half of 19th century
  • 1st half of 20th century
  • 2nd half of 20th century
The sequence of origin of life may be considered as 
  • Amino acid $$\rightarrow$$ Protein $$\rightarrow$$ Chlorophyll
  • Chlorophyll $$\rightarrow$$ Starch $$\rightarrow$$ Glycogen
  • Nucleic acid $$\rightarrow$$ Amino acid $$\rightarrow$$ Chlorophyll
  • Chlorophyll $$\rightarrow$$ Nucleic acid $$\rightarrow$$ Amino acid
The first formed organism (ribo-organism) used only .............. for catalyzing reactions.
  • DNA
  • Amino aicds
  • Fatty acids
  • RNA
An evolving coacervate-like system would have needed a controlled and constant source of energy for ____________.
  • Making large complex molecules
  • Organizing these molecules into structural patterns
  • Maintaining their organization
  • All of the above
Geologic time scale was developed by 
  • Aristotle
  • C. Lapworth
  • A. Sedgwick
  • G. Arduino
Biologists believe that the current DNA $$\rightarrow$$ RNA $$\rightarrow$$ Protein system is the result of a long period of evolution because
  • The transcription of DNA to mRNA and translation of mRNA into proteins consists of many steps.
  • DNA replication is complicated but relatively error-free and the current system is very complex and precise.
  • Evidence indicates that RNA preceded DNA as the genetic material.
  • All of the above.
A population is in Hardy-Weinberg equilibrium for a gene with only two alleles. If the gene frequency of an allele A is 0.7, the genotype frequency of Aa is
  • 0.21
  • 0.42
  • 0.36
  • 0.7
What  are the  necessary conditions for the modern population genetics or evolution called as Hardy Weinberg Law?
  • Selective mating and a small population
  • A high mutation rate and random mating
  • A low mutation rate and a small population
  • No migration and large population
Which one of the factors do not bring deviation from the proportions of homozygotes and heterozygotes predicted by the Hardy-Weinberg law?
  • Mutation
  • Dominant genes
  • Genetic drift
  • Selection
Who was the first civilized man?
  • Cromagnon man
  • Neanderthal man
  • Heidelberg man
  • Ternifier man
Handy man is
  • Cro-Magnon
  • Neanderthal
  • Homo habilis
  • None of the above
Hardy-Weinberg equilibrium is known to be effected by gene flow, genetic drift, mutation, genetic recombination and
  • Evolution
  • Limiting factors
  • Saltation
  • Natural selection
  • Over prediction
The family Pongidae includes ____________.
  • Fossils and modern man
  • Fossil forms and present day gorillas
  • Gorilla and chimpanzee
  • Both (B) and (C)
Which of the following processes affect the Hardy-Weinberg Equilibrium to cause variation at the genetic level?
  • Mutation and recombination
  • Gene migration and genetic drift
  • Natural selection
  • All of the above
Assuming Hardy-Weinberg equilibrium 30% of a population is homozygous dominant, 41 % is hetrozygous and 29% is homozygous recessive. What % of the next generation is predicted to be homozygous recessive?
  • 30%
  • 41%
  • 29%
  • 25%
Immortality of soul hypothesis has given rise to the discovery of 
  • Heidelberg man
  • Ternifer man
  • Neanderthal man
  • Homo sapiens
In a random mating population of 28,800 individuals percentage of dominant homozygous individuals is 49%. Find out the percentage of the heterozygous individuals?
  • 21%
  • 42%
  • 32%
  • 9%
In a population that is in Hardy Weinberg equilibrium, the frequency of a recessive allele for a certain hereditary trait is 0.What percentage of the individual in the next generation would be expected to show the dominant trait?
  • 16%
  • 32%
  • 64%
  • 96%
Genetic drift operates in only ........... populations.
  • Island
  • Smaller
  • Larger
  • Mendelian
The correct sequence of stages in the evolution of the modern man (Homo sapiens) is
  • Neanderthal man, Australopithecus, Cro-magnon man, Homoerectus, Modern man
  • Australopithecus, Homo sapiens, Neanderthal man, Cro-magnon man, Modern man
  • Homo erectus, Australopithecus, Neanderthal man, Cro-magnon man, Modern man
  • Australopithecus, Homo erectus, Neanderthal man, Cro-magnon man, Modern man
Neanderthal man differs from modern man in
  • Receeding jaw
  • Protruding jaw
  • Could make good tools
  • Could make good pictures
Who is considered as ancestor of modern apes?
  • Dryopithecus
  • Ramapithecus
  • Oreopithecus
  • None of the above
One of the oldest, best preserved and most complete hominid fossil commonly known as 'Lucy' belongs to the genus
  • Oreopithecus
  • Dryopithecus
  • Pithecanthropus
  • Australopithecus
Based on physical similarity, which skulls appear to be most closely related?
228528_98c6d37c84e243b8be11d6b423c46384.png
  • 1 and 2
  • 1 and 3
  • 2 and 3
  • 2 and 4
  • 1 and 4
The rate of appearance of new forms is linked to the life cycle or the life span.
  • True
  • False
Which of the following represents a high degree of artistic and cultural sense in the evolution of man?
  • Homo habilis
  • Cro-magnan man
  • Java man
  • Peking man
New world monkeys are 
  • Primitive and found in central and south America
  • Advanced and found in central and south America
  • Primitive and found in Asia, Europe and Africa
  • Advanced and found in Asia, Europe and Africa
'Piltdown man' is
  • Homo habilis
  • Eoanthropus
  • Homo sapiens
  • Pithecanthropus
Ancestor of man, who first time showed bipedal movement is
  • Cro-Magnon
  • Australopithecus
  • Java ape man
  • Peking man
The correct sequence of human evolution is
  • Australopithecus $$\rightarrow$$ Homo-Habilis $$\rightarrow$$ Homoerectus $$\rightarrow$$ Homo-Neanderthalensis$$\rightarrow$$ Cro-magnon
  • Australopithecus $$\rightarrow$$ Homo-Habilis $$\rightarrow$$Homo-Neanderthalensis $$\rightarrow$$ Homoerectus $$\rightarrow$$ Cro-magnin $$\rightarrow$$ Homosapiens
  • Australopithecus $$\rightarrow$$ Homo-Neander thalensis $$\rightarrow$$ Homo-Habilis $$\rightarrow$$ Homoerectus $$\rightarrow$$ Cro-magnon $$\rightarrow$$ Homosapiens
  • Homo-Habilis $$\rightarrow$$ Homo-Neanderthalensis $$\rightarrow$$ Australopithecus $$\rightarrow$$ Homoerectus $$\rightarrow$$ Cro-magnon $$\rightarrow$$ Homosapiens
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