Free Evolution MCQs with Answers

• A. Adaptation
• B. Evolution
• C. Neo-Darwinsm
• D. Special creation

Explanation: Evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection.

• A. Genes
• B. Anatomy
• C. Physiology
• D. Acquired characters

Explanation: A gene is the basic physical and functional unit of heredity. Genes are made up of DNA.

• A. A semipermeable membrane and a nucleus
• B. Competition for resources and the development of hereditary mechanisms
• C. A semipermeable membrane and the ability to catalyze chemical reactions
• D. A nucleus and the ability to catalyze chemical reactions

Explanation: Early protobionts, which were simple, non-living structures, needed two critical developments to evolve into true living cells.

• A. The results supported the Oparin hypothesis by showing that organisms contributed to the composition of Earth's present-day atmosphere.
• B. The results contradicted the Oparin hypothesis by showing that Earth's early atmosphere could not produce cells from organic molecules.
• C. The results supported the Oparin hypothesis by showing that replicating membranes could form from simple molecular precursors.
• D. The results supported the Oparin hypothesis by showing that biological molecules could form in conditions resembling the early Earth.

Explanation: Urey and Miller simulated the conditions found early in Earth's history (reducing atmosphere, water vapor, lightning) and showed that…

• A. I only
• B. II only
• C. I and II
• D. I and III

Explanation: Oparin and Haldane's artificial atmosphere contained hydrogen gas and other reducing gases.

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

Explanation: Variation allows some individuals within a population to adapt to the changing environment.

• A. Genotype
• B. Phenotype
• C. Recombination
• D. Polymorph

Explanation: Option A: Genotype is the genetic complement i.e. the genes in an individual for a particular trait.

• A. Straight evolution
• B. Convergent evolution
• C. Zig-zag evolution
• D. Divergent evolution

Explanation: "Analogous organs" are structures that perform similar functions but have different evolutionary origins.

• A. Gene
• B. Genome
• C. Genotype
• D. Gene Pool
• E. Karyotype

Explanation: Gene pool refers to the sum total of all the genes, alleles, and their variations present in a population at a particular time.

• A. Darwin-survival of the fittest
• B. Darwin-no extinction
• C. Lamarck-acquired transmission
• D. Both Darwin-survival of the fittest and Lamark-acquired transmission

Explanation: Charles Darwin proposed the theory of natural selection and survival of the fittest, stating that organisms that are better adapted to…

• A. Adaptations
• B. Polymorphism
• C. Niches
• D. Specialization

Explanation: The correct answer is niches. A niche encompasses the role a species plays in its ecosystem, including how it acquires resources…

• A. Convergent evolution
• B. Divergent evolution
• C. Natural selection
• D. Common ancestry

Explanation: Convergent evolution is the process by which unrelated species evolve similar traits independently, often due to similar environmental…

• A. Genetic drift
• B. Mutation
• C. Emmigration
• D. Immigration

Explanation: Genetic drift takes place when the occurrence of variant forms of a gene, called alleles, increases and decreases by chance over time.

• A. Genetic linkage
• B. Genetic expression
• C. Genetic diversity
• D. Gene pool

Explanation: Population bottlenecks significantly affect the gene pool by drastically reducing the number of individuals and thus the genetic variation…

• A. Vestigial structures
• B. Analogous structures
• C. Homologous structures
• D. None of these options are correct

Explanation: Vestigial structures are those that have lost their original function through evolution.

• A. Struggle for existence
• B. Descent with modification
• C. Inheritance of acquired characteristics
• D. Production of more individuals than the environment can support

Explanation: The correct answer is Struggle for existence. This aspect of Darwin's theory is depicted in the diagram by illustrating the competition…

• A. Struggle for existence
• B. Survival of fittest
• C. Natural selection
• D. Evolution

Explanation: When there are more individuals in a population than the environment can support, competition for limited resources such as food, water…

• A. Darwin's natural selection
• B. Lamarck's theory
• C. Hardy-Weinberg theorem
• D. Weinberg's principle

Explanation: Adapting to Environments. Through evolution, species adapt over time to become better suited to their environments.

• A. Essay on population by Malthus
• B. Lamarck's theory
• C. L. Millers evidence for origin of life
• D. Mendel's paper on inheritance Cortana

Explanation: Option A is correct since Charles Darwin was greatly influenced by the idea of Malthus on population control.

• A. 1857
• B. 1877
• C. 1836
• D. 1833

Explanation: There Darwin spent considerable time ashore collecting plants and animals.