Free Evolution MCQs with Answers
814 Evolution MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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- A. Qualitative characters
- B. Analytical characters
- C. Quantitative characters
- D. Morphological characters
Explanation: The correct answer is quantitative characters. These traits, which can be measured and quantified, like height or weight, are essential…
Correct answer: Quantitative characters- A. Tree
- B. Stem
- C. Trunk
- D. Fork
Explanation: In the Darwinian view, the evolutionary history of life is often depicted as a tree, where the main trunk represents the common ancestry…
Correct answer: Fork- A. Although quite different, they seemed to be of the same species
- B. Although quite similar, they seemed to be of different species
- C. Separated from their original habitats by geographical barriers
- D. Some were unique to individual islands
Explanation: The correct answer is Option A: Although quite different, they seemed to be of the same species.
Correct answer: Although quite different, they seemed to be of the same species- A. North American coastline
- B. North African coastline
- C. South American coastline
- D. South African coastline
Explanation: In 1831, Charles Darwin embarked on a significant scientific journey aboard the HMS Beagle, primarily focusing on the South American…
Correct answer: South American coastline- A. Vestigial structures
- B. Fossils
- C. Homologous structures
- D. Analogous structures
Explanation: The correct answer is fossils. Fossils are vital to understanding the chronological appearance of life forms, as they are the physical…
Correct answer: Fossils- A. Virus
- B. Bacteria
- C. Plants
- D. Animals
Explanation: The oldest known fossils are of prokaryotic cells, specifically bacteria, which date back over 3.5 billion years.
Correct answer: Bacteria- A. Neo-Darwinism
- B. Neo-Lamarckism
- C. Modern Synthesis
- D. Both A and C
Explanation: The correct answer is Neo-Darwinism and Modern Synthesis. This term refers to the 20th-century synthesis of Charles Darwin's evolutionary…
Correct answer: Both A and C- A. Convergent evolution
- B. Analogous structures
- C. Homologous structures
- D. Bottleneck affect
Explanation: Organs that are similar in structure but differ in function are termed homologous organs.
Correct answer: Homologous structures- A. Teeth of a domestic dog, teeth of a wolf
- B. Wings of Geospiza magnirostris, wings of Geospiza fortis
- C. Wings of hawkmoths, wings of hawks
- D. All of these
Explanation: Convergent evolution occurs when different species develop similar traits independently, often because they have adapted to similar…
Correct answer: Wings of hawkmoths, wings of hawks- A. Acquired traits can be passed on to offspring
- B. Living forms become perfect with time
- C. Nervous fluids are passed on from generation to generation
- D. Evolution is related to changes in adaptation to the environment
Explanation: Lamarck said that living organisms bring changes in them according to their environment, and the acquired traits are also passed to the…
Correct answer: Acquired traits can be passed on to offspring- A. Inherited traits
- B. Acquired traits
- C. Behavioral adaptations
- D. Structural adaptations
Explanation: Adaptations that an organism acquires by its own actions are called acquired traits.
Correct answer: Acquired traits- A. Genus
- B. Family
- C. Species
- D. Community
Explanation: A group of populations that have the potential to interbreed in nature is known as a species.
Correct answer: Species- A. Nose
- B. Ear
- C. Pharynx
- D. Eustachian tubes
Explanation: In human embryonic development, gill pouches transform into the eustachian tubes, which are essential for maintaining equal air pressure…
Correct answer: Eustachian tubes- A. Inheritance of acquired characteristics
- B. Theory of genetic changes
- C. Both A and B
- D. None of these
Explanation: Lamarck's theory of evolution is based on the idea of inheritance of acquired characteristics, where traits acquired or lost during an…
Correct answer: Theory of genetic changes- A. Increases
- B. Decreases
- C. Remains same
- D. None of these
Explanation: Genetic drift refers to random changes in allele frequencies within a population, which can result in the loss or fixation of alleles over…
Correct answer: Decreases- A. Exbreeding
- B. Breeding
- C. Inbreeding
- D. Outbreeding
Explanation: Inbreeding is the mating of closely related individuals, such as siblings, cousins, or uncles and nieces.
Correct answer: Inbreeding- A. Mutations cause changes in genetic frequency
- B. Migration changes allele frequency
- C. There should not be a selection
- D. Non-random mating will reduce the chances of evolution
Explanation: The correct answer is Option D: Non-random mating will reduce the chances of evolution.
Correct answer: Non-random mating will reduce the chances of evolution- A. Polymorphism
- B. Specialization
- C. Gene linkage
- D. Adaptation
Explanation: The correct answer is adaptation. Natural selection leads to genetic changes in a population by favoring alleles that confer a survival…
Correct answer: Adaptation- A. Virion
- B. Viroid
- C. Prion
- D. None
Explanation: The correct answer is 'None' because the earliest forms of life on Earth were primitive single-celled organisms, such as prokaryotes.
Correct answer: None- A. Genome
- B. Gene pool
- C. Genetic group
- D. Genomic library
Explanation: The correct answer is 'Gene pool.' This term refers to the total genetic diversity within a population or species, including all the…
Correct answer: Gene pool