Evolution
4 solved NEET Biology previous year questions on Evolution, each with the correct answer and a full explanation.
Q1
Genetic drift operates in
✓ Correct answer: a) small isolated population
ExplanationGenetic drift is most effective in small isolated populations, where chance events can easily change allele frequencies.
Q2
Which of the following had the smallest brain capacity? [PYQ 2015]
✓ Correct answer: b) Homo habilis
Explanation(2) Homo erectus had a large brain around 900cc.Homo habilis had brain capacities between 650-800cc.The Neanderthal man with a brain size of 1400cc. [New NCERT Class 12th Page No. 124, 125]
Q3
Variations caused by mutation, as proposed by Hugo de Vries, are [NEET 2019]
✓ Correct answer: c) random and directionless
ExplanationAccording to Hugo de Vries, mutations are random and directionless.De Vries believed mutations caused speciation and hence called saltation (Single step large change).
Q4
The flippers of the Penguins and Dolphins are the example of the:
✓ Correct answer: d) convergent evolution.
ExplanationAnalogous structures are a result of convergent evolution - different structures evolving for the same function and hence having similarity.Examples of analogy are the eye of the octopus and of mammals or the flippers of Penguins and Dolphins.
Practice more NEET Biology PYQs
Browse every Biology chapter, or explore the full NEET question bank.
🧬 All Biology chapters →