🧬 Biology MCQ Questions

Set – 1 | Practice Questions for General Science & Competitive Exams

Challenge yourself with Biology MCQs and check answers with detailed explanations

Q1. The branch of biology that studies insects is called:
  • (A) Malacology
  • (B) Ichthyology
  • (C) Entomology
  • (D) Parasitology
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Correct answer is Entomology. It is the branch of biology that studies insects.
Q2. The science of studying human populations is known as:
  • (A) Genetics
  • (B) Demography
  • (C) Ecology
  • (D) Anthropology
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Correct answer is Demography. It is the statistical study of human populations including size, structure, and distribution.
Q3. Zoology mainly deals with:
  • (A) Fossilized plants and animals
  • (B) Only living plants
  • (C) All animals, living and extinct
  • (D) Marine organisms only
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Correct answer is All animals, living and extinct. Zoology is the branch of biology that studies the structure, behavior, and evolution of all animals, both living and extinct.
Q4. Archeopteryx is considered a:
  • (A) Reptile of Jurassic period
  • (B) Most ancient bird of Jurassic age
  • (C) Reptile of Triassic period
  • (D) Early amphibian
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Correct answer is Most ancient bird of Jurassic age. Archaeopteryx is a transitional fossil linking reptiles and birds.
Q5. Archaeopteryx is a connecting link between:
  • (A) Aves and Mammalia
  • (B) Reptilia and Mammalia
  • (C) Amphibia and Aves
  • (D) Reptilia and Aves
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Correct answer is Reptilia and Aves. Archaeopteryx shows characters of both reptiles and birds.
Q6. The prehistoric mammoth is the ancestor of:
  • (A) Dog
  • (B) Elephant
  • (C) Camel
  • (D) Horse
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Correct answer is Elephant. Mammoths are extinct relatives of modern elephants.
Q7. Which is the largest mammal?
  • (A) Polar bear
  • (B) African elephant
  • (C) Whale
  • (D) Hippopotamus
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Correct answer is Whale. The blue whale is the largest mammal ever known.
Q8. Whales belong to which group of animals?
  • (A) Reptiles
  • (B) Mammals
  • (C) Fishes
  • (D) Amphibians
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Correct answer is Mammals. Whales breathe air and give birth to young ones.
Q9. Which of the following is a mammal?
  • (A) Squid
  • (B) Whale
  • (C) Shark
  • (D) Octopus
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Correct answer is Whale. Whales are warm-blooded mammals.
Q10. Among toothed whales, the largest species is:
  • (A) Sperm whale
  • (B) Blue whale
  • (C) Humpback whale
  • (D) Finback whale
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Correct answer is Sperm whale. It is the largest toothed whale species.
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