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Evolution Test - 71

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Evolution Test - 71
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  • Question 1
    1 / -0
    When more than one adaptive radiation appeared to have occured in an isolated geographical area. it is called ?
    Solution
    Adaptive radiation refers to an evolutionary process in which different species evolve from a common ancestor, on inhabiting new areas as they successfully adapt to their environment; while convergent evolution is an evolutionary process in which different structures of different species are evolved for the same function. Hence during adaptive radiation, the changes are determined by the environment. The organism evolves to survive in a particular environment. Therefore, if two different adaptive radiation occurs in an area, then it is most likely that both the evolved species will have similar adaptations to survive in that particular area. Hence, they will develop similar structures to perform similar functions.

    So, the correct option is 'Convergent Evolution'
  • Question 2
    1 / -0
    Example of adaptive radiation is
    Solution
    the correct answer is a)  Darwin's finches 
    the finches had a common ancestry and as conditions changed they radiated from one island to others with a subsequent change in their morphology (eg.  beak) owing to the different feeding habits.
  • Question 3
    1 / -0
    Evolution of heart from one to two, three and four chambered proves:
    Solution
    The biogenetic law given by Ernst Haeckel states that the developmental stages of embryos of the animal follow a link common to ancestor or in other words, it goes through stages resembling or representing successive stages in the evolution of the animals' ancestors- ontogeny recapitulates phylogeny. The evolution of heart from one to two three and four chambers proves this biogenetic law.
    So, the correct answer is 'Biogenic law of Haeckel'
  • Question 4
    1 / -0
    Which of the following is most widely accepted with respect to the origin of life?
    Solution
    Big bang hypothesis explained that the universe had an explosive beginning which was explained by a steady-state hypothesis, condensation theory, and collision theory. 
    (1) Steady-state hypothesis explained that this origin of the universe was due to the transformation of mass to energy and energy to mass. 
    (2) Condensation theory explained that the earth originated five billion years ago by gradual condensation of the red-hot, gaseous cloud of primordial matter.  
    (3) Collision theory explained the origin of the earth like a broken of the segment from the sun.
    Therefore these three theories explain the origin of life on earth with proper pieces of evidence, hence big bang theory is widely accepted.
  • Question 5
    1 / -0
    First life on earth was?
    Solution
    • The fact that the oldest known fossils from the Archaean rocks of western Australia are of cyanobacteria is a very strong proof of them being the oldest lifeform on the Earth. 
    • These fossils date back to 3.5 billion years and are found in rocks that are themselves 3.8 billion years old. 
    • These shreds of evidence support the theory stating that cyanobacteria are the oldest living lifeform son the Earth.
    • So, the correct answer is 'Cyanobacteria'.
  • Question 6
    1 / -0
    The most recent era in geological time scale is:
    Solution
    • The great Precambrian expanse of time is divided into eons in order of age.
    • The names of the era are Phanerozoic eon (eon of visible life)
    • The Cenozoic era (Era of recent life)
    • The Mesozoic Era (Middle life)
    • The Paleozoic Era (Ancient life)
    So, the correct answer is 'cenozoic'
  • Question 7
    1 / -0
    Read the following four (A-D) statements:

    (a) The cranial capacity of Homo habilis was 650-800 c.c
    (b) The cranial capacity of Homo erectus was about 900 c.c
    (c) Around two mya Australopithecus probably lived in east african grasslands.
    (d) During the ice age, Homo sapiens arose.

    How many of the above statements are not incorrect:
    Solution
    All the $$4$$ statements are correct
    (a) Homo-Hibilis were first human like being with $$650-800cc$$ cranial capacity.
    (b) Homo erectus existed $$1.5$$ million years ago with cranial capacity $$900cc$$.
    (c) Prof Raymond Darl, discovered fossil and renamed it as Africans ( African apeman) $$ 2$$ mya, Australopithecines lived in rest African grasslands.
    (d) During in- age between $$75000-10000$$ years ago modern Homo sapiens arose.

  • Question 8
    1 / -0
    The occurrence of difference among the individuals of the same species is due to 

  • Question 9
    1 / -0
    According to available evidence life evolved through the process of?
  • Question 10
    1 / -0
    According to theory of abiogenesis, life originates from?
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