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Evolution — NEET Biology MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

30questions
10/14/6easy / medium / hard
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Sample questions from this chapter

Electric discharge is passed through methane, ammonia, hydrogen and water vapour under simulated early-earth conditions, producing amino acids. What does this support?
  1. Abiotic chemical evolution of organic molecules ✓
  2. Spontaneous generation of modern cells
  3. Panspermia as the sole origin of life
  4. Inheritance of acquired characters
Answer: A. The result shows that biologically relevant molecules can form abiotically in a reducing atmosphere with energy input. It supports a chemical prelude to life, not laboratory creation of life.
Why not B: The experiment formed organic monomers, not living cells from decaying matter.
Why not C: Panspermia proposes arrival from space, whereas the flask tests synthesis under earth-like conditions.
Why not D: Lamarckian inheritance concerns organismal change after life already exists.
An antibiotic kills susceptible bacteria, but rare resistant cells survive and reproduce. Which interpretation is correct?
  1. The drug teaches each bacterium to resist
  2. Resistance develops because bacteria strive to survive
  3. The drug selects heritable resistance already present or newly arising by chance ✓
  4. Antibiotics increase bacterial generation time until adaptation occurs
Answer: C. Antibiotic treatment is the environmental selection pressure; resistant genotypes leave descendants while susceptible ones die. Overuse repeatedly enriches those alleles.
Why not A: Exposure filters variants rather than instructing a targeted genetic response.
Why not B: Need and effort do not create inheritable alleles.
Why not D: Rapid multiplication exposes variation, but resistance spreads through differential survival.
A recessive disease affects 1 in 10,000 individuals in a Hardy–Weinberg population. Approximately what fraction are carriers?
  1. About 1.98% ✓
  2. About 0.01%
  3. About 10%
  4. About 0.0001%
Answer: A. q²=0.0001 gives q=0.01 and p≈0.99; 2pq≈0.0198 or 1.98%. Rare recessive alleles hide mainly in heterozygotes.
Why not B: This confuses q²=0.0001 with the carrier frequency.
Why not C: q is 0.01, and carrier frequency is about twice that, not ten times.
Why not D: This understates even the affected frequency by converting the proportion again.

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Every NCERT question in this chapter is solved, free: NCERT solutions — Evolution →

Other NEET Biology chapters

The Living WorldBiological ClassificationPlant KingdomAnimal KingdomMorphology of Flowering PlantsAnatomy of Flowering Plants

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Questions

How many NEET questions are there on Evolution?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 12 chapter.

Is this NEET Biology chapter test free?

Yes. Every chapter test is free with no login. The only paid thing on the site is the full-length 90-question Biology mock and its all-India rank.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.