Q1. Which of the following is a key concept of the Modern Synthesis of evolution? (1942)
Solution:
The Modern Synthesis integrates natural selection with Mendelian genetics, providing a comprehensive explanation of evolution.
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Q2. The concept of 'survival of the fittest' is most closely associated with which evolutionary theory?
Solution:
'Survival of the fittest' is a phrase often associated with Darwinism, which emphasizes natural selection as a key mechanism of evolution.
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Q3. What is the role of fossils in understanding evolution? (2020)
Solution:
Fossils provide crucial evidence of past life forms and their changes over time, helping scientists understand the process of evolution and the history of life on Earth.
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Q4. What is the role of mutations in evolution? (2018)
Solution:
Mutations provide genetic variation, which is essential for evolution as it introduces new traits that may be subject to natural selection.
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Q5. Which of the following is NOT a condition for natural selection to occur?
Solution:
Uniformity of traits is not a condition for natural selection; rather, variation in traits is essential for natural selection to act upon.
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Q6. The theory that organisms can pass on traits acquired during their lifetime is known as?
Solution:
Lamarckism is the theory that organisms can pass on traits acquired during their lifetime, which has been largely discredited in favor of Darwinian evolution.
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Q7. Which of the following is a source of genetic variation? (1937)
Solution:
All of the options listed (mutation, gene flow, and sexual reproduction) are sources of genetic variation in populations.
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Q8. Which of the following best describes the concept of 'survival of the fittest'?
Solution:
'Survival of the fittest' refers to the idea that those individuals best adapted to their environment are more likely to survive and reproduce.
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Q9. The theory that explains the gradual change in species over time is known as? (1972)
Solution:
Gradualism is the theory that evolution occurs slowly and steadily over long periods of time.
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Q10. What is the primary mechanism of evolution proposed by Charles Darwin?
Solution:
Charles Darwin proposed the mechanism of evolution known as Natural Selection, which explains how species adapt and evolve over time based on environmental pressures.
