Free Evolution MCQs with Answers

• A. Polymorphism
• B. Gene linkage
• C. Specialization
• D. Replication

Explanation: The correct answer is Specialization. Specialization refers to how organisms adapt particular traits to perform specific functions or to…

• A. Wing of an insect, wing of a bird
• B. Leg of a dog, leg of a spider
• C. The arm of a human, wing of a bird
• D. All of these options are correct

Explanation: The organs which have the anatomically same structure but are different in functions are called homologous organs.

• A. Recessive alleles eventually disappear in large populations.
• B. Expected frequencies of alleles are impossible to predict mathematically.
• C. Dominant alleles become more prevalent in large populations.
• D. When there is a large population, the mechanism of inheritance does not change allele frequencies.

Explanation: The Hardy-Weinberg principle serves as a model for understanding how allele frequencies remain constant over generations in the absence of…

• A. Mutation
• B. Selection
• C. Non-random mating
• D. Genetic drift

Explanation: The change in frequency of an allele at a locus that occurs by chance is called genetic drift.

• A. Cyanobacteria
• B. Chlamydomonas
• C. Paramecium
• D. Spirochetes

Explanation: Flagella are thought to have evolved through the endosymbiotic relationship where certain bacteria, like spirochetes, were incorporated…

• A. Lamarck
• B. Aristotle
• C. Wallace
• D. Darwin

Explanation: Jean Baptiste Lamarck was one of the first scientists to propose a coherent theory of evolution, known as Lamarckism, which posited that…

• A. Homozygous
• B. Heterozygous
• C. Genetic diversity
• D. Genetic linkage

Explanation: Inbreeding increases the frequency of homozygous genotypes because mating between related individuals often results in offspring that have…

• A. No natural selection
• B. No net migration of individuals into or out of the population
• C. Random mating
• D. Small population

Explanation: The Hardy-Weinberg principle states that allele frequencies in a large, randomly mating population remain constant, provided that no…

• A. A trait that enhances an organism's adaptive success in its environment
• B. A structure inherited from a common ancestor that has adapted to serve different functions
• C. A modification in an organism's genetic material
• D. A structure that has lost its original function but is still present

Explanation: Option D is correct because a vestigial trait is a remnant of a structure that was functional in a species' ancestors but has since lost…

• 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: The correct answer is D. Lamarck acknowledged that evolution involves adaptive changes to the environment, a concept that remains central…

• A. Dmitri Ivanovsky
• B. Dmitry Anuchin
• C. Nikolay Shatsky
• D. Alexander Oparin

Explanation: Alexander Oparin is credited with the primordial soup hypothesis, suggesting that life on Earth originated from a series of chemical…

• A. Taxonomic
• B. Phylogenetic
• C. Homologous
• D. Analogous

Explanation: Option D is correct since bird wings and insect wings are 'analogous' structures as both of these species have wings that they use for…

• A. Inheritance of acquired characteristics
• B. Theory of genetic change
• C. Both A and B
• D. None of these

Explanation: The theory of genetic change is false because he implies that all organisms would gradually become complex, and simple organisms disappear.

• A. Hershey Chase experiment.
• B. Geiger Marsden experiment.
• C. Schiehallion experiment.
• D. Miller-Urey experiment.

Explanation: The correct answer is the Miller-Urey experiment, which was designed to mimic the early Earth's atmosphere using a mixture of gases and…

• A. The Origin Of Species By Natural Selection
• B. The Origin Of Species
• C. The Evolution Of Species
• D. The Evolution Of Species By Means Of Natural Selection

Explanation: The Origin of Species" is a book written by Charles Darwin and published in 1859.

• A. Mutation
• B. Evolution
• C. Migration
• D. Genetic drift

Explanation: The correct answer is Evolution. It is the comprehensive process by which species of organisms develop from earlier forms through changes…

• A. Artificial selection
• B. Founder effect
• C. Bottleneck effect
• D. Both a and b

Explanation: The correct answer is the bottleneck effect. This occurs when an event drastically reduces a population's size, resulting in a loss of…

• A. Genetic drift
• B. Diversity
• C. Linkage
• D. All of these

Explanation: Genetic drift is the correct answer, as it describes the random changes in allele frequencies that occur in a population due to chance…

• A. Decreased
• B. Increased
• C. Remains the same
• D. Becomes zero

Explanation: Option B is correct as less genetic diversity is the raw material of evolution.

• A. Homozygosity
• B. Heterozygosity
• C. Gene linkage
• D. Gene pool

Explanation: The correct answer is option 'B', 'heterozygosity'. Outbreeding increases heterozygosity by encouraging the mixing of different alleles…