Science Group
Explore subjects and practice MCQs
10
Chapters
1,000
Total MCQs
Unit-10 Evolution
Answer: Evolution is the gradual change in the inherited characteristics of living organisms over successive generations and long periods of time.
Answer: The word evolution is derived from the Latin word 'evolvere' which means 'to unfold' or to develop gradually.
Answer: Lamarck proposed the theory of inheritance of acquired characteristics and the principle of use and disuse of organs.
Answer: Darwin published his ideas on natural selection in 'The Origin of Species' in 1859.
Answer: Darwin's 'On the Origin of Species' was published in 1859.
Answer: Use and disuse is part of Lamarck's theory, not Darwin's theory of natural selection.
Answer: Lamarck suggested that giraffes stretched their necks to reach leaves on tall trees, and this acquired trait was passed to offspring.
Answer: Overproduction leads to more individuals than resources, causing a struggle for existence among them.
Answer: The term 'survival of the fittest' was introduced by Herbert Spencer, though it is commonly associated with Darwin's ideas.
Answer: Lamarck's theory states that characteristics acquired during the lifetime of an organism can be inherited by its offspring.
Answer: The law of use and disuse states that organs used frequently develop more, while organs not used gradually degenerate.
Answer: Paleontology is the scientific study of fossils, which provides evidence for evolution.
Answer: Lamarck used the giraffe's long neck as an example of use and disuse leading to an acquired characteristic.
Answer: Sedimentary rocks form in layers over time and are the most common rocks in which fossils are preserved.
Answer: The principle of superposition states that in undisturbed rock layers, older fossils lie below younger ones.
Answer: Similar basic structures in homologous organs suggest that the organisms evolved from a common ancestor.
Answer: Charles Darwin proposed the theory of natural selection in his book 'On the Origin of Species'.
Answer: Analogous organs develop independently in unrelated organisms adapting to similar environments, a process called convergent evolution.
Answer: Dinosaurs went extinct around 65 million years ago, possibly due to an asteroid impact and climate change.
Answer: Natural selection favours organisms best suited to their environment, allowing them to survive and pass on their traits.