Free Evolution MCQs with Answers

• A. Water
• B. Hydrogen present in soil
• C. Hydrogen sulphate
• D. Hydrogen sulphide

Explanation: Correct option: D , Early photosynthetic organisms used hydrogen sulfide as a source of hydrogen.

• A. On the Origin of Species by Means of Natural Selection.
• B. The Origin of Species by Natural Selection.
• C. The Origin of Species
• D. The Evolution of Species

Explanation: The correct title is *On the Origin of Species by Means of Natural Selection*.

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

Explanation: 'Polymorphism' means that different shapes and structures exist. 'A' is not the answer because replication is the division of the cell.

• A. Genus
• B. Family
• C. Species
• D. Community

Explanation: The correct answer is Species. In biological terms, a species is defined as a group of individuals that are capable of interbreeding and…

• A. 1.5 billion years ago
• B. 4.5 billion years ago
• C. 1000 million years ago
• D. 3.5 billion years ago

Explanation: Prokaryotes are believed to have evolved approximately 3.5 billion years ago, making them some of the earliest forms of life on Earth.

• A. Inbreeding
• B. Ex breeding
• C. Breeding
• D. Outbreeding

Explanation: The correct answer is Inbreeding. Inbreeding is the mating between relatives, which can lead to a higher probability of offspring…

• A. They have the same organs
• B. They have common ancestors
• C. They have similiar appearance
• D. All of the above options are correct

Explanation: A homologous trait is often called a homolog. In genetics, the term "homolog" is used both to refer to a homologous protein and the gene (…

• A. Increased
• B. Decreased
• C. No change
• D. None of these

Explanation: An evolutionarily successful allele tends to increase in frequency within a population because it confers a survival or reproductive…

• A. Fossil record
• B. Vestigial structures
• C. Common ancestor organisms
• D. None of these

Explanation: The correct answer is 'None of these' because all of the listed options are valid evidence for evolution.

• A. Rate of spontaneous mutation
• B. Levels of aggression
• C. Increases genetic diversity
• D. Expression of deleterious recessive traits

Explanation: Inbreeding occurs when closely related individuals mate. This increases the chance that offspring inherit two copies of the same allele…

• A. Use and disuse of organs
• B. Inheritance of acquired characteristics
• C. Natural selection
• D. Both A and B

Explanation: Lamarck's theory of evolution centers on two main ideas: the use and disuse of organs and the inheritance of acquired characteristics.

• A. When the populations begin to eat different foods
• B. When there is a physical barrier, such as a river, between the two populations
• C. When the two populations have not been in contact with one another for two hundred years
• D. When they are no longer able to interbreed

Explanation: Speciation is defined by the biological concept of species, which states that species are groups of interbreeding natural populations that…

• A. Genetic drift
• B. Mutation
• C. Migration
• D. Natural selection

Explanation: The question describes the definition of a genetic drift, which is a change in the frequency of alleles that occurs purely by chance.

• A. How giraffes got their long neck
• B. How humans lost their tails
• C. How humans became bipedal
• D. All of these

Explanation: Lamarckism posits that organisms can pass on traits acquired during their lifetime to their offspring.

• A. No observable evidence
• B. Clear, observable evidence
• C. Vague, hypothetical signs
• D. Confusing, random patterns

Explanation: Evolution provides clear and observable evidence that is well-documented through scientific research.

• A. Canterbury in western England
• B. Shrewsbury in western England
• C. Canterbury in eastern England
• D. Shrewsbury in eastern England

Explanation: Charles Darwin, the renowned naturalist known for his contributions to the theory of evolution, was born on February 12, 1809, in…

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

Explanation: The correct answer is Lamarck. He introduced the concept that traits acquired in an organism's lifetime could be inherited by its…

• A. Forelimbs of humans and bats
• B. Wings of birds and insects
• C. Beaks of Darwin's finches
• D. All of the above options are correct

Explanation: The correct answer is the wings of birds and insects. This represents convergent evolution, where both groups independently developed…

• A. Morphological similarities
• B. Fossil record
• C. Vestigial characteristics
• D. All of the above

Explanation: All the provided options are correct, as they each offer evidence of evolution from a common ancestor.

• A. Population
• B. Fossils
• C. Vestigial organs
• D. Homologous organs

Explanation: The correct answer is Fossils. Fossils are the preserved remains or impressions of organisms from the geological past, typically found in…