Evolution
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Preview questions (no answers)
- 1.
Who experimentally disproved the theory of spontaneous generation using a swan-neck flask experiment?
A.Charles Darwin
B.Oparin and Haldane
C.Louis Pasteur
D.Alfred Wallace
- 2.
Considering the age of the universe to be about 20 billion years, Earth is estimated to have been formed approximately how many years ago?
A.500 million years
B.3 billion years
C.4.5 billion years
D.10 billion years
- 3.
In his famous experiment to simulate primitive Earth conditions, S.L. Miller observed the formation of which of the following molecules?
A.Polysaccharides
B.Amino acids
C.DNA
D.Chlorophyll
Download the worksheet for Evolution - Origin of Life to practice offline. It includes additional chapter-level practice questions.
Evidence for Biological Evolution
SubtopicEvidence for Biological Evolution under Evolution for Grade 12 CBSE.
Preview questions (no answers)
- 1.
The presence of similar structures in different organisms that perform the same function but have different anatomical origins is called:
A.Homology
B.Analogy
C.Atavism
D.Vestigial structures
- 2.
Darwin's finches found in the Galapagos Islands are an excellent example of:
A.Industrial melanism
B.Connecting links
C.Adaptive radiation
D.Convergent evolution
- 3.
Which of the following pairs represents homologous organs?
A.Thorns of Bougainvillea and tendrils of Cucurbita
B.Wings of a butterfly and wings of a bird
C.Flippers of a penguin and flippers of a dolphin
D.Eyes of an octopus and eyes of a mammal
Download the worksheet for Evolution - Evidence for Biological Evolution to practice offline. It includes additional chapter-level practice questions.
Darwinian Theory and Modern Synthetic Theory
SubtopicDarwinian Theory and Modern Synthetic Theory under Evolution for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Which famous book, published in 1859, laid the foundation for evolutionary biology through the concept of natural selection?
A.The Descent of Man
B.On the Origin of Species
C.Philosophie Zoologique
D.Genetics and the Origin of Species
- 2.
According to Darwinian theory, what does 'fitness' primarily refer to?
A.Physical strength and speed
B.Ability to survive harsh weather conditions
C.Intelligence and social hierarchy
D.Reproductive success and leaving more progeny
- 3.
Charles Darwin's theory of evolution by natural selection was significantly influenced by the work of which economist regarding human population growth?
A.Thomas Malthus
B.Alfred Russel Wallace
C.Jean-Baptiste Lamarck
D.Hugo de Vries
Download the worksheet for Evolution - Darwinian Theory and Modern Synthetic Theory to practice offline. It includes additional chapter-level practice questions.
Mechanism of Evolution (Variation and Mutation)
SubtopicMechanism of Evolution (Variation and Mutation) under Evolution for Grade 12 CBSE.
Preview questions (no answers)
- 1.
In the context of the mechanism of evolution, mutations are considered to be:
A.Predictable and small
B.Directional and beneficial
C.Continuous and slow
D.Random and directionless
- 2.
According to Charles Darwin, variations that lead to evolution are:
A.Small and directional
B.Random and directionless
C.Large and sudden
D.Non-heritable and environmental
- 3.
What term did Hugo de Vries use to describe a 'single-step large mutation' that he believed caused speciation?
A.Natural selection
B.Genetic drift
C.Saltation
D.Branching descent
Download the worksheet for Evolution - Mechanism of Evolution (Variation and Mutation) to practice offline. It includes additional chapter-level practice questions.
Hardy-Weinberg Principle
SubtopicHardy-Weinberg Principle under Evolution for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Genetic equilibrium refers to a state in which:
A.The population is evolving rapidly due to mutations
B.Only dominant alleles are passed to the next generation
C.The number of individuals increases exponentially
D.The allele frequencies in a population remain constant over generations
- 2.
Which of the following conditions is necessary for a population to remain in Hardy-Weinberg equilibrium?
A.Large population size
B.High rate of mutation
C.Frequent migration (gene flow)
D.Strong natural selection
- 3.
According to the Hardy-Weinberg principle, the sum total of all allelic frequencies in a population is:
A.0
B.1
C.100
D.Variable depending on population size
Download the worksheet for Evolution - Hardy-Weinberg Principle to practice offline. It includes additional chapter-level practice questions.
Adaptive Radiation
SubtopicAdaptive Radiation under Evolution for Grade 12 CBSE.
Preview questions (no answers)
- 1.
The evolution of various Australian marsupials, such as the Kangaroo, Sugar glider, and Marsupial mole from a single ancestral stock within the Australian continent, is an example of:
A.Convergent evolution
B.Adaptive radiation
C.Saltation
D.Founder effect
- 2.
According to Darwin's observations, what was the original diet of the ancestral finches before they radiated into various forms on the Galapagos Islands?
A.Insectivorous
B.Seed-eating
C.Cactus-eating
D.Woodpecker-like
- 3.
Darwin's finches, found on the Galapagos Islands, are a classic example of which biological phenomenon?
A.Industrial melanism
B.Artificial selection
C.Adaptive radiation
D.Co-evolution
Download the worksheet for Evolution - Adaptive Radiation to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Which prehistoric human ancestor is specifically known for using hides to protect their bodies and performing burial rituals for the dead?
A.Homo erectus
B.Neanderthal man
C.Australopithecus
D.Homo habilis
- 2.
Based on fossil evidence, in which continent did the early hominids most likely evolve and live?
A.Africa
B.Asia
C.Europe
D.Australia
- 3.
The cranial capacity of Homo habilis, the first 'human-like' hominid, was in the range of:
A.cc
B.cc
C.cc
D.cc
Download the worksheet for Evolution - Human Evolution to practice offline. It includes additional chapter-level practice questions.