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Evolution Test - 61

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Evolution Test - 61
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Life expectancy is
  • Question 2
    1 / -0
    The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge is called :
    Solution
    • Convergent evolution is a topic of evolutionary biology which can be described as the process where some diverse organisms individually develop the traits which are similar in function. 
    • For example : insects, birds, pterosaurs, and bats; all have developed the similar nature of the flight/wings. All four serve the same function and are similar in structure, but each evolved independently.
    So, the correct answer is 'Convergent evolution'
  • Question 3
    1 / -0
    Semelparity is
  • Question 4
    1 / -0
    Cognogeny is
  • Question 5
    1 / -0
    Evolution of different species starting from a point and spreading to other areas is :
    Solution
    Evolution of different species starting from a point and spreading to other areas is migration.
    Example, evolution of humans
  • Question 6
    1 / -0
    Anthropometry is
  • Question 7
    1 / -0
    Occurrence of non-beneficial alleles in heterozyguos genotype is :
    Solution
    • Genetic load is the reduction in the mean fitness of a population relative to a population composed entirely of individuals having optimal genotypes. 
    • It is due to the occurrence of non-beneficial alleles in heterozygous genotype.
    • Genetic load can be caused by recurrent deleterious mutations, genetic drift, recombination affecting epistatically favourable gene combinations, or other genetic processes.
    So, the correct answer is 'Genetic load'
  • Question 8
    1 / -0
    According to Darwin, diversity as found in Australian marsupials is due to :
    Solution
    Australian marsupials evolved due to convergent evolution. It is a process by which organisms evolve independently but with similar traits due to similar environment. Placental mammals and marsupials exhibits the same ecological niche in different parts of the world which got separated during continental drift.
    So, the correct answer is 'Convergent evolution'
  • Question 9
    1 / -0
    An evolutionary pattern characterised by increase in number and kind of closely related species is :
    Solution
    parallel evolution - is the evolution of closely related lineages usually with a single common ancestor.
    Example, mammals, placentals and Marsupials
  • Question 10
    1 / -0
    Hardy-Weinberg principle cannot operate if :
    Solution
    Hardy-Weinberg equilibrium cannot operate if there are changes in allelic frequencies in the population. Various factors capable of changing allelic frequency are Gene migration or gene flow, Genetic drift, Mutation, Genetic recombination, Natural selection.
    So, the correct answer is 'Frequent mutations occur in population'
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