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Evolution Test - 38

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Evolution Test - 38
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  • Question 1
    1 / -0
    Similarities between organisms of different genotypes is due to 
    Solution
    Convergent evolution is the process whereby organisms not closely related, independently evolve similar traits as a result of having to adapt to similar environments or ecological niches. Common examples are microbats, toothed whales and shrews developed sonar-like echolocation systems used for orientation, obstacle avoidance and for locating prey. Several groups of ungulates have independently reduced or lost side digits on their feet, often leaving one or two digits for walking
    So, the correct answer is 'Convergent evolution'
  • Question 2
    1 / -0
    Mass extinction at the end of Mesozoic era was probably caused by
    Solution
    During mesozoic era, distinct terrestrial biotas evolved on each continent. Dinosaurs diversified to become the dominant large predators and herbivores. The era ended with a mass extinction event caused by the collision of earth with a large meteorite.
    Therefore, the correct answer is option C.
  • Question 3
    1 / -0
    Which one is the important consequence of geographical isolation?
    Solution
    • The lineage-splitting event that is used to produce two or more separate species is called speciation. 
    • Natural disasters and natural changes can lead to geographical isolation. 
    • One of the main consequences of geographical isolation is speciation through reproductive isolation, which is the inability of members of the different populations to mate with the other.
    • The isolation that occurs through geographical separation of the population is also known as allopatric speciation. 

    Thus the correct answer is option D.
  • Question 4
    1 / -0
    Archaeopteryx, toothed fossil bird occurred during 
    Solution
    Archaeopteryx is a genus of dinosaurs. They provide important transitional link between dinosaurs and modern birds. They are also called as flightless ancient ancestral bird. They occurred during late Jurassic period. 
    Thus, the correct answer is option A.
  • Question 5
    1 / -0
    What is common between whale, seal and shark?
    Solution
    In evolutionary biology, convergent evolution is the process whereby organisms not closely related, independently evolve similar traits as a result of having to adapt to similar environments or ecological niches. Convergent evolution creates analogous structures that have similar form or function, but that were not present in the last common ancestor of those groups. Whale, seal and sharks shows convergent evolution, as they have analogous structures used for swimming. 
    Therefore, the correct answer is option D.
  • Question 6
    1 / -0
    The earliest hominids that developed more than four million years ago were 
  • Question 7
    1 / -0
    Which of the following statement is correct about Cro-Magnon man?
  • Question 8
    1 / -0
    Genetic drift operates in which of the following population?
    Solution
    • Genetic drift is defined as the variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.
    • Genetic drift occurs in small populations because the reason is occasional occurrences of alleles getting lost with higher probability. If and when this loss of alleles starts then the genetic drift continues until that specific allele is totally lost in the entire population.
    • Hence Genetic drift operates in a small isolated population.
    • So, the correct answer is 'Small isolated population'.
  • Question 9
    1 / -0
    The earliest gases of the primitive earth were 
  • Question 10
    1 / -0
    One of the most important divisions under the Kingdom Planate, gymnosperms are believed to be originated 265 million years ago and flourished in the year in which dinosaurs were predominant. Which era is this?
    Solution
    Mesozoic era is said to be the era of dinosaurs. It was divided into 3 periods namely Triassic, Jurassic and cretaceous. It was also known as the age of reptiles. Conifers and pines were the major among plants found in that area. At the end of the Jurassic period, flowering plants began to appear.
    So, option C is the correct answer.
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