CBSE Class 12 Biology Evolution MCQs Set B

Question. Who was the first member of the genus Homo?
a) Homo habilis
b) Homo erectus
c) Homo neanderthalensis
d) Homo sapiens

Answer : A

Question. The cranial capacity of Homo erectus was
a) 900 c.c.
b) 1350 c.c.
c) 1075 c.c.
d) 1450 c.c.

Answer : A

Question. The correct sequence for the manufacture of molecules/organic compounds on the primitive earth is
a) NH3, nucleic acid, protein and carbohydrate
b) protein, carbohydrate, water and nucleic acid
c) NH3, protein, carbohydrate and nucleic acid
d) NH3, water, nucleic acid and protein.

Answer : D

Question. Embryological support for evolution was disapproved by
a) Karl Ernst von Baer
b) Alfred Wallace
c) Charles Darwin
d) Oparin.

Answer : A

Question. Similarities in organism with different genotype indicates
a) microevolution
b) macroevolution
c) convergent evolution
d) divergent evolution.

Answer : C

Question. At a particular locus, frequency of A allele is 0.6 and that of a is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium?
a) 0.36
b) 0.16
c) 0.24
d) 0.48

Answer : D

Question. Jurassic period of the Mesozoic era is characterised by
a) flowering plants and first dinosaurs appear
b) gymnosperms are dominant plants and first birds appear
c) radiation of reptiles and origin of mammal like reptiles
d) dinosaurs become extinct and angiosperms appear.

Answer : B

Question. Which of the following cannot be explained by Lamarckism?
a) Absence of lips in snakes
b) Long neck of giraffe
c) Degeneration of visual apparatus in cave dwellers
d) Dull progeny of noble laureate

Answer : D

Question. The idea of mutations was brought forth by
a) Hugo de Vries who worked on evening primrose
b) Gregor Mendel who worked on Pisum sativum
c) Hardy-Weinberg who worked on allele frequencies in a population
d) Charles Darwin who observed a wide variety of organisms during sea voyage.

Answer : A

Question. Which of the following amino acids was not found to be synthesised in Miller’s experiment?
a) Alanine
b) Glycine
c) Aspartic acid
d) Glutamic acid

Answer : D

Question. Which of the following was most similar to modern man?
a) Java man
b) Neanderthal man
c) Homo habilis
d) Cro-Magnon man

Answer : D

Question. Humming birds and Hawk illustrate
a) convergent evolution
b) homology
c) adaptive radiation
d) parallel evolution.

Answer : C

Question. Which one of the following changes involved is irrelevant, in the evolution of man?
a) Perfection of hand for tool making
b) Change of diet from hard nuts and hard roots to soft food
c) Loss of tail
d) Increase in the ability to communicate with others and develop community behaviour

Answer : B

Question. Which of the following statements is correct about the origin and evolution of men ?
a) Agriculture came around 50,000 years back.
b) The Dryopithecus and Ramapithecus primates existing 15 million years ago, walked like men.
c) Homo habilis probably ate meat.
d) Neanderthal men lived in Asia between 1,00,000 and 40,000 years back.

Answer : D

Question. Theory of inheritance of acquired characters was given by
a) Wallace
b) Lamarck
c) Darwin
d) De Vries.

Answer : B

Question. Flippers of penguins and dolphins are examples of
a) adaptive radiation
b) convergent evolution
c) industrial melanism
d) natural selection.

Answer : B

Question. The presence of gill slits, in the embryos of all vertebrates, supports the theory of
a) metamorphosis
b) biogenesis
c) organic evolution
d) recapitulation.

Answer : D

Question. A population is in Hardy- weinberg equilibrium for a gene with only two alleles. If the gene frequency of an allele A is 0.7, the genotype frequency of Aa is
a) 0.21
b) 0.42
c) 0.36
d) 0.7

Answer : B

Question. Among the following sets of examples for divergent evolution, select the incorrect option.
a) Forelimbs of man, bat and cheetah
b) Heart of bat, man and cheetah
c) Brain of bat, man and cheetah
d) Eye of octopus, bat and man

Answer : D

Question. In the case of peppered moth (Biston betularia) the black-coloured form became dominant over the light-coloured form in England during industrial revolution. This is an example of
a) appearance of the darker coloured individuals due to very poor sunlight
b) protective mimicry
c) inheritance of darker colour character acquired due to the darker environment
d) natural selection whereby the darker forms were selected.

Answer : D

Question. Most abundant organic compound on earth is
a) protein
b) cellulose
c) lipids
d) steroids.

Answer : B

Question. Reason of diversity in living being is
a) mutation
b) long term evolutionary change
c) gradual change
d) short term evolutionary change.

Answer : B

Question. Which of the following isotopes is most dangerous to Homo sapiens?
a) Phosphorus-32
b) Strontium-90
c) Caesium-137
d) Iodine-131

Answer : B

Question. Evolutionary convergence is development of
a) common set of characters in group of different ancestry
b) dissimilar characters in closely related groups
c) common set of characters in closely related groups
d) random mating.

Answer : A

Question. Which one of the following describes correctly the homologous structures ?
a) Organs with anatomical similarities, but performing different functions
b) Organs with anatomical dissimilarities, but performing same function
c) Organs that have no function now, but had an important function in ancestor
d) Organs appearing only in embryonic stage and disappearing later in the adult

Answer : A