Evolution and Classification MCQs 2026

Darwin developed his theory of natural selection largely based on observations made during his voyage on

1. AHMS Victory✓
2. BHMS Endeavour✓
3. CHMS Beagle✓
4. DHMS Challenger✓

The naturalist who independently proposed a theory of evolution by natural selection similar to Darwin's is

1. AAlfred Russel Wallace✓
2. BThomas Huxley✓
3. CErnst Haeckel✓
4. DHerbert Spencer✓

Organs that are structurally similar due to common ancestry but may perform different functions are called

1. AAnalogous organs✓
2. BHomologous organs✓
3. CVestigial organs✓
4. DConvergent organs✓

Organs that perform similar functions but differ in structure and origin, such as the wings of birds and insects, are called

1. AHomologous organs✓
2. BVestigial organs✓
3. CAnalogous organs✓
4. DRudimentary organs✓

The human appendix is considered a classic example of a

1. AHomologous organ✓
2. BVestigial organ✓
3. CAnalogous organ✓
4. DRegenerated organ✓

Evolution in which two unrelated species independently develop similar traits due to similar environmental pressures is called

1. AConvergent evolution✓
2. BDivergent evolution✓
3. CCoevolution✓
4. DAdaptive radiation✓

The evolution of a single ancestral species into multiple diverse species, each adapted to a different niche, exemplified by Darwin's finches, is called

1. AConvergent evolution✓
2. BCoevolution✓
3. CPunctuated equilibrium✓
4. DAdaptive radiation✓

The evolutionary pattern in which a species remains largely unchanged for long periods, interrupted by rapid bursts of change, is called

1. AGradualism✓
2. BAdaptive radiation✓
3. CGenetic drift✓
4. DPunctuated equilibrium✓

The principle that allele and genotype frequencies in a population remain constant in the absence of evolutionary influences is called

1. AMendelian inheritance✓
2. BNatural selection theorem✓
3. CFounder effect✓
4. DHardy-Weinberg principle✓

A random change in allele frequency in a population due to chance events, especially significant in small populations, is called

1. ANatural selection✓
2. BGenetic drift✓
3. CGene flow✓
4. DMutation✓

When a small group of individuals establishes a new population and carries only a small, non-representative sample of the original population's genetic diversity, this is called

1. ABottleneck effect✓
2. BGene flow✓
3. CNatural selection✓
4. DFounder effect✓

A sharp reduction in population size due to a random event, drastically reducing genetic diversity, is called the

1. AFounder effect✓
2. BGene flow✓
3. CAdaptive radiation✓
4. DBottleneck effect✓

The movement of alleles between populations due to migration of individuals is called

1. AGenetic drift✓
2. BNatural selection✓
3. CGene flow✓
4. DMutation✓

The ultimate source of all new genetic variation in a population is

1. ANatural selection✓
2. BGene flow✓
3. CGenetic drift✓
4. DMutation✓

Formation of new species due to geographic separation of populations is called

1. ASympatric speciation✓
2. BAdaptive radiation✓
3. CAllopatric speciation✓
4. DPunctuated equilibrium✓

Formation of new species within the same geographic area without physical separation is called

1. AAllopatric speciation✓
2. BDivergent evolution✓
3. CSympatric speciation✓
4. DFounder effect✓

The biological species concept, widely attributed to Ernst Mayr, defines a species primarily based on

1. AAbility to interbreed and produce fertile offspring✓
2. BPhysical appearance alone✓
3. CGeographic location✓
4. DDNA sequence identity✓

The type of natural selection that favors an extreme phenotype over the average is called

1. AStabilizing selection✓
2. BDirectional selection✓
3. CDisruptive selection✓
4. DBalancing selection✓

Natural selection that favors both extreme phenotypes over the intermediate phenotype is called

1. AStabilizing selection✓
2. BDirectional selection✓
3. CSexual selection✓
4. DDisruptive selection✓

Natural selection that favors the average or intermediate phenotype and reduces variation is called

1. ADirectional selection✓
2. BDisruptive selection✓
3. CSexual selection✓
4. DStabilizing selection✓

The darkening of peppered moth populations in industrial England, favoring dark-colored moths that were better camouflaged on soot-covered trees, is a classic example of

1. AIndustrial melanism (natural selection in action)✓
2. BGenetic drift✓
3. CFounder effect✓
4. DGene flow✓

The development of antibiotic-resistant bacteria over time is best explained as an example of

1. ANatural selection acting on bacterial populations✓
2. BLamarckian inheritance✓
3. CGenetic drift only✓
4. DRandom mutation with no selective advantage✓

The scientific classification and naming of organisms using a two-part Latin name is called

1. ACladistics✓
2. BPhylogeny✓
3. CBinomial nomenclature✓
4. DTaxonomy alone✓

The system of binomial nomenclature was formally established by

1. ACharles Darwin✓
2. BErnst Haeckel✓
3. CRobert Whittaker✓
4. DCarl Linnaeus✓

In the hierarchical classification system, which taxonomic rank is broader than Order but narrower than Phylum

1. AFamily✓
2. BGenus✓
3. CClass✓
4. DSpecies✓

The correct sequence of taxonomic hierarchy from broadest to narrowest is

1. AKingdom, Phylum, Class, Order, Family, Genus, Species✓
2. BPhylum, Kingdom, Class, Family, Order, Genus, Species✓
3. CKingdom, Class, Phylum, Order, Family, Genus, Species✓
4. DPhylum, Class, Kingdom, Order, Genus, Family, Species✓

The five-kingdom classification system, which includes Monera, Protista, Fungi, Plantae, and Animalia, was proposed by

1. ACarl Linnaeus✓
2. BRobert Whittaker✓
3. CCarl Woese✓
4. DErnst Haeckel✓

The three-domain system of classification, dividing life into Bacteria, Archaea, and Eukarya, was proposed by

1. ARobert Whittaker✓
2. BCharles Darwin✓
3. CCarl Woese✓
4. DAristotle✓

Organisms in the kingdom Monera are characterized by

1. AMulticellular eukaryotic bodies✓
2. BProkaryotic cell structure lacking a true nucleus✓
3. CChitin cell walls✓
4. DChlorophyll-containing chloroplasts only✓

Which of the following is a defining characteristic of kingdom Fungi

1. APhotosynthetic autotrophs✓
2. BCell walls made of cellulose✓
3. CHeterotrophic organisms with cell walls made of chitin✓
4. DProkaryotic cell organization✓

Amoeba and Paramecium are classified under which kingdom

1. AMonera✓
2. BProtista✓
3. CFungi✓
4. DAnimalia✓

Viruses are generally excluded from the standard biological classification system because they

1. AContain both DNA and RNA✓
2. BAre too small to observe✓
3. CReproduce sexually✓
4. DAre not considered fully living, lacking independent cellular structure and metabolism✓

The branch of biology that studies the classification of organisms based on evolutionary relationships is called

1. APhylogenetic taxonomy (cladistics)✓
2. BPhysiology✓
3. CEcology✓
4. DEmbryology✓

A diagram that represents the evolutionary relationships among various species based on shared common ancestry is called a

1. APhylogenetic tree✓
2. BPunnett square✓
3. CPedigree chart✓
4. DEcological pyramid✓

Archaeopteryx, an important fossil showing features of both reptiles and birds, is considered strong evidence for

1. AConvergent evolution✓
2. BEvolution from reptiles to birds✓
3. CAdaptive radiation only✓
4. DGenetic drift✓

"Lucy," a well-known fossil important to the study of human evolution, belongs to the species

1. AHomo erectus✓
2. BHomo habilis✓
3. CAustralopithecus afarensis✓
4. DHomo neanderthalensis✓

The hominid species generally regarded as the first to use stone tools is

1. AAustralopithecus afarensis✓
2. BHomo erectus✓
3. CHomo habilis✓
4. DHomo sapiens✓

The hominid species believed to be the first to control fire and migrate out of Africa is

1. AHomo erectus✓
2. BHomo habilis✓
3. CAustralopithecus✓
4. DHomo sapiens✓

The scientific theory proposing that early Earth's atmosphere allowed simple organic molecules to form spontaneously, laying the foundation for the origin of life, is the

1. ATheory of biogenesis✓
2. BOparin-Haldane hypothesis of chemical evolution✓
3. CTheory of spontaneous generation✓
4. DPunctuated equilibrium theory✓

The famous experiment that simulated early Earth conditions to demonstrate the formation of organic molecules from inorganic gases was conducted by

1. ALouis Pasteur✓
2. BGregor Mendel✓
3. CCharles Darwin✓
4. DStanley Miller and Harold Urey✓

Louis Pasteur's experiments are most closely associated with disproving which theory

1. ANatural selection✓
2. BSpontaneous generation✓
3. CInheritance of acquired characteristics✓
4. DContinental drift✓

The mass extinction event most commonly associated with the disappearance of non-avian dinosaurs is the

1. ACretaceous-Tertiary (K-T) extinction✓
2. BPermian-Triassic extinction✓
3. COrdovician-Silurian extinction✓
4. DDevonian extinction✓

A close evolutionary interaction in which two species reciprocally affect each other's evolution, such as flowering plants and their pollinators, is called

1. ACoevolution✓
2. BAdaptive radiation✓
3. CGenetic drift✓
4. DConvergent evolution✓

The scientific naming convention requires the genus name to be

1. AWritten in lowercase and not italicized✓
2. BCapitalized and italicized (or underlined)✓
3. CAbbreviated always✓
4. DWritten in all capital letters✓

Fossils are most commonly formed and found within which type of rock

1. AIgneous rock✓
2. BMetamorphic rock✓
3. CSedimentary rock✓
4. DVolcanic rock✓

The scientific classification and identification of organisms, encompassing description, naming, and classification, is called

1. APhysiology✓
2. BEcology✓
3. CGenetics✓
4. DTaxonomy✓

Charles Darwin proposed his theory of evolution primarily through the mechanism of

1. AInheritance of acquired characteristics✓
2. BNatural selection✓
3. CGenetic drift✓
4. DUse and disuse of organs✓

Darwin's theory of natural selection was published in which landmark work

1. AThe Descent of Man✓
2. BOn the Origin of Species✓
3. CPhilosophie Zoologique✓
4. DSystema Naturae✓

Jean-Baptiste Lamarck proposed that evolution occurs through

1. AInheritance of acquired characteristics✓
2. BNatural selection✓
3. CGenetic mutation✓
4. DRandom genetic drift✓

The phrase "survival of the fittest" was coined by

1. ACharles Darwin✓
2. BAlfred Russel Wallace✓
3. CHerbert Spencer✓
4. DGregor Mendel✓