CBSE Class 12 (Science) Evolution — practice questions
94 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 (Science) Evolution in the app →The mechanism of evolution proposed by Darwin isThe Miller-Urey experiment (1953) demonstrated that:Charles Darwin's mechanism of evolution is best described as:The Hardy-Weinberg principle's equation for genotype frequencies is:The wings of insects and the wings of birds are best described as:The human APPENDIX is a classic example of a:The shift in peppered moth (Biston betularia) colour during the Industrial Revolution is an example of:The 14 species of finches that Darwin observed on the Galapagos Islands are a classic example of:Genetic drift is STRONGEST in which type of population?Homo sapiens (modern humans) first evolved in:Who demonstrated that life comes only from pre-existing life?Oparin, who proposed chemical evolution, was from:Haldane, who proposed the same idea, was from:Miller performed his famous experiment in:Miller's flask contained water vapour, hydrogen, ammonia and:Miller observed the formation of:The first cellular form of life arose about how many million years ago?Forelimbs of different mammals sharing one bone plan are:Homology indicates:Structures with similar function but different plan are:Darwin observed his famous finches at:Species evolving from one point and spreading to other habitats shows:The two key concepts of Darwinian theory are natural selection and:Which French naturalist put forward a theory before Darwin?In the moth collection of the 1850s, the more numerous moths were:By 1920, after industrialisation, the more numerous moths were:The sum total of all allelic frequencies in a population is:A constant gene pool across generations is called genetic:How many factors are known to affect Hardy-Weinberg equilibrium?Dryopithecus and Ramapithecus existed about how many million years ago?Homo habilis had a brain capacity of:Homo erectus fossils were discovered in 1891 in:Roughly how old is the universe, according to NCERT?About how long ago is the earth supposed to have formed?Which theory explains the origin of the universe as a singular huge explosion?Which two elements formed first after the universe expanded and cooled?On early earth, what did UV rays from the sun split water into?The idea that spores of life were transferred between planets is called what?Life arising from decaying straw and mud was the theory of what?Who dismissed spontaneous generation by showing life comes from pre-existing life?Which two scientists proposed that life arose from non-living organic molecules?In which year did S.L. Miller perform his origin-of-life experiment?What did Miller's experiment produce from CH4, H2, NH3 and water vapour?What was used to simulate lightning in Miller's closed flask?About how long ago did the first cellular forms of life possibly originate?The theory of special creation claims the earth is about how old?Darwin made his voyage of observations on which ship?According to Darwin, fitness refers ultimately to which kind of fitness?Which naturalist working in the Malay Archipelago reached conclusions similar to Darwin's?Evidence for evolution from fossils in rock layers is called what?Which scientist proposed embryological support for evolution based on vertebrate embryos?Who disproved Haeckel's embryological proposal?Vertebrate embryos develop a row of what, functional only in fish?Whale, bat, cheetah and human forelimbs show similarity in what?Homologous structures are based on which type of evolution?Wings of a butterfly and of a bird are an example of what?Which pair is an example of analogous structures?Sweet potato (root) and potato (stem) illustrate which relationship?The eye of an octopus and the eye of a mammal are examples of what?Why did dark moths increase after industrialisation?Which organisms are used as indicators of industrial pollution because they fail to grow in polluted areas?Herbicide and antibiotic resistance are examples of evolution by what?Evolution is described as a stochastic process. What does this mean?Evolution of different species radiating from a point into other habitats is called what?On which islands did Darwin observe the finches with varied beaks?The varied finch beaks evolved from which original feeding feature?Which animals of Australia are another example of adaptive radiation?Multiple adaptive radiations in an isolated area, giving look-alike forms, show what?Branching descent and what else are the two key concepts of Darwinian theory?Why do new forms appear within days in bacteria but take millions of years in fish?For natural selection to act, fitness must have what basis?Which French naturalist proposed evolution through use and disuse of organs?Lamarck's example of use and disuse involved which animal?The work of which economist on populations probably influenced Darwin?Which scientist used evening primrose to propose mutation as the cause of evolution?De Vries called single-step large mutations causing speciation by what name?How did Darwin's variations differ from de Vries's mutations?In the Hardy-Weinberg equation, which term gives the frequency of heterozygotes?The Hardy-Weinberg equation p2 + 2pq + q2 = 1 is a binomial expansion of what?Change in allele frequency occurring by chance is called what?When a drifted population becomes a new species, the effect is called what?Natural selection in which more individuals acquire the mean character value is which type?Selection favouring peripheral values at both ends of a distribution is called what?Which fish, caught in South Africa in 1938, was thought to be extinct?Lobefins evolved into the first members of which group?Amphibians evolved into which group that lays thick-shelled eggs?Which fish-like reptiles were an example of land reptiles returning to water?About when did the dinosaurs suddenly disappear from the earth?The earliest mammals were similar to which small animal?What was the brain capacity of Homo habilis?What was the approximate brain size of Homo erectus?Which early humans used hides for protection and buried their dead?Prehistoric cave paintings are seen at which rock shelter in Madhya Pradesh?About how many years ago did agriculture and human settlements begin?