Evolution

Who proposed the theory of natural selection? (BPSC 64th Prelims)
a) Lamarck
b) Charles Darwin
c) Huxley
d) Mendel
Answer: b
Explanation: Charles Darwin proposed the theory of natural selection in his book Origin of Species.
The "Origin of Species" is a work by: (BPSC 63rd Prelims)
a) Wallace
b) Charles Darwin
c) Lamarck
d) Pasteur
Answer: b
Explanation: Darwin published On the Origin of Species in 1859, explaining his theory of evolution.
According to Darwin, evolution occurs due to: (UPPSC 2018)
a) Mutation
b) Use and disuse
c) Natural selection
d) Sudden change
Answer: c
Explanation: Darwin emphasized natural selection as the mechanism of evolution.
The idea that 'use and disuse of organs' leads to evolution was given by: (BPSC 66th Prelims)
a) Darwin
b) Wallace
c) Lamarck
d) Mendel
Answer: c
Explanation: Lamarck's theory of inheritance of acquired characters is based on use and disuse.
The term "survival of the fittest" is associated with: (BPSC 67th Prelims)
a) Lamarck
b) Charles Darwin
c) Herbert Spencer
d) Mendel
Answer: c
Explanation: Although often linked with Darwin, the phrase was coined by Herbert Spencer.
Which of the following is not a human ancestor? (UPPSC 2016)
a) Homo habilis
b) Australopithecus
c) Cro-Magnon
d) Neanderthal
Answer: d
Explanation: Neanderthals are related to humans but not direct ancestors.
Which scientist is associated with the mutation theory of evolution? (BPSC 65th Prelims)
a) Darwin
b) Hugo de Vries
c) Mendel
d) Wallace
Answer: b
Explanation: Hugo de Vries proposed that mutations cause evolution.
Archaeopteryx is a connecting link between: (BPSC 60–62nd Prelims)
a) Fish and Amphibians
b) Amphibians and Reptiles
c) Reptiles and Birds
d) Mammals and Reptiles
Answer: c
Explanation: Archaeopteryx had both reptilian and avian features.
Which of the following provides direct evidence for evolution? (BPSC 68th Prelims)
a) Comparative anatomy
b) Fossils
c) Biogeography
d) Embryology
Answer: b
Explanation: Fossils give direct evidence of organisms that lived in the past.
Which is considered the closest relative of modern humans? (BPSC 67th Prelims)
a) Neanderthal man
b) Cro-Magnon man
c) Homo erectus
d) Australopithecus
Answer: b
Explanation: Cro-Magnons are considered early modern humans.

NCERT-Based Questions (Q11–30)

Evolution is best defined as:
a) Sudden changes in an organism
b) Gradual development of complex organisms from simpler forms
c) Reproduction of species
d) Heredity transfer
Answer: b
Explanation: Evolution is a gradual change in the characteristics of organisms over generations.
Who proposed the theory of inheritance of acquired characteristics?
a) Darwin
b) Wallace
c) Lamarck
d) Mendel
Answer: c
Explanation: Lamarck believed that traits acquired during an organism's lifetime are passed on.
Which organism is considered the first vertebrate on Earth?
a) Fish
b) Amphibians
c) Reptiles
d) Mammals
Answer: a
Explanation: Fossil records show that fishes were the first vertebrates to evolve.
The study of fossils is called:
a) Palaeontology
b) Archaeology
c) Geology
d) Taxonomy
Answer: a
Explanation: Palaeontology deals with the study of fossils and ancient life forms.
Which of the following is an example of adaptive radiation?
a) Industrial melanism
b) Darwin’s finches
c) Evolution of man
d) Formation of fossils
Answer: b
Explanation: Darwin’s finches show adaptive radiation, where a species evolves into many to fill different niches.
Which gas was absent in Earth’s early atmosphere?
a) Hydrogen
b) Nitrogen
c) Oxygen
d) Methane
Answer: c
Explanation: Early Earth's atmosphere lacked free oxygen.
The common ancestor of man and apes is believed to be:
a) Australopithecus
b) Homo erectus
c) Cro-Magnon
d) Homo habilis
Answer: a
Explanation: Australopithecus is considered the common ancestor of modern humans and apes.
Which structure is a vestigial organ in humans?
a) Liver
b) Appendix
c) Heart
d) Pancreas
Answer: b
Explanation: The appendix is considered a vestigial organ with no known modern function.
Which of the following is not an evidence of evolution?
a) Fossils
b) Embryology
c) Ecology
d) Comparative anatomy
Answer: c
Explanation: Ecology is not a direct evidence of evolution.
The fossil of the earliest bird is:
a) Pteranodon
b) Archaeopteryx
c) Ichthyosaurus
d) Sphenodon
Answer: b
Explanation: Archaeopteryx is considered the first bird fossil showing features of both reptiles and birds.
What type of evolution is shown by the wings of bat and bird?
a) Divergent evolution
b) Parallel evolution
c) Convergent evolution
d) Co-evolution
Answer: c
Explanation: Wings of bats and birds are analogous structures formed due to convergent evolution.
The age of fossils is determined by:
a) Rock type
b) Size of bones
c) Carbon dating
d) Color of fossils
Answer: c
Explanation: Radiocarbon dating is used to estimate the age of fossils.
Which of the following explains speciation?
a) Gene flow
b) Mutation
c) Natural selection
d) Reproductive isolation
Answer: d
Explanation: Speciation often results from reproductive isolation of populations.
Embryological similarities suggest:
a) Adaptation
b) Common ancestry
c) Mutation
d) Genetic drift
Answer: b
Explanation: Similar embryonic development indicates shared ancestry.
Evolutionary history of an organism is called:
a) Phylogeny
b) Ontogeny
c) Paleontology
d) Anatomy
Answer: a
Explanation: Phylogeny traces the evolutionary lineage of a species.
Which scientist worked with Darwin on the theory of evolution?
a) Hugo de Vries
b) Alfred Wallace
c) Haeckel
d) Mendel
Answer: b
Explanation: Wallace developed a similar theory and corresponded with Darwin.
The idea of "ontogeny recapitulates phylogeny" was proposed by:
a) Darwin
b) Haeckel
c) Lamarck
d) Wallace
Answer: b
Explanation: Haeckel proposed that an organism's development reflects its evolutionary history.
Which species evolved first?
a) Homo habilis
b) Homo erectus
c) Cro-Magnon
d) Homo sapiens
Answer: a
Explanation: Homo habilis is considered the earliest known species of the genus Homo.
Mutation is a:
a) Slow process
b) Directional change
c) Sudden change in DNA
d) Reversible process
Answer: c
Explanation: Mutations are sudden changes in the genetic material.
Which of these is an example of artificial selection?
a) Darwin’s finches
b) Domestication of dogs
c) Evolution of giraffe neck
d) Antibiotic resistance
Answer: b
Explanation: Humans have selectively bred dogs for desirable traits.

Predicted/Reference Book-Based Questions (Q31–50)

Which of the following evolved first?
a) Reptiles
b) Amphibians
c) Fishes
d) Birds
Answer: c
Explanation: Fishes were the first vertebrates to evolve.
Human beings belong to which species?
a) Homo erectus
b) Homo sapiens
c) Homo habilis
d) Australopithecus
Answer: b
Explanation: The scientific name of modern humans is Homo sapiens.
Which of these is a homologous organ?
a) Wings of birds and insects
b) Flippers of whale and human hand
c) Eyes of octopus and human
d) Wings of bat and butterfly
Answer: b
Explanation: These share a common structure but different functions.
Which scientist coined the term "survival of the fittest"?
a) Darwin
b) Lamarck
c) Wallace
d) Herbert Spencer
Answer: d
Explanation: Herbert Spencer introduced the phrase "survival of the fittest".
Genetic drift operates more significantly in:
a) Large populations
b) Small populations
c) All populations
d) Only human populations
Answer: b
Explanation: Genetic drift is more impactful in small populations.
Which of the following is a vestigial structure in humans?
a) Ear
b) Coccyx
c) Lung
d) Kidney
Answer: b
Explanation: The coccyx (tailbone) is a vestigial remnant of a tail.
Which is not a part of Darwin’s theory?
a) Overproduction
b) Survival of fittest
c) Inheritance of acquired traits
d) Struggle for existence
Answer: c
Explanation: Inheritance of acquired traits is part of Lamarckism, not Darwinism.
The first human-like being that lived in Africa was:
a) Homo sapiens
b) Homo habilis
c) Homo erectus
d) Neanderthal
Answer: b
Explanation: Homo habilis is considered the first tool-using human.
What does industrial melanism show?
a) Mutation
b) Natural selection
c) Genetic drift
d) Genetic engineering
Answer: b
Explanation: Industrial melanism in moths is an example of natural selection.
Fossils found in deeper layers are:
a) Younger
b) Older
c) Artificial
d) Unchanged
Answer: b
Explanation: Older fossils are found deeper in Earth's strata.
Adaptive radiation results in:
a) One species evolving into many
b) Loss of diversity
c) Genetic uniformity
d) Elimination of species
Answer: a
Explanation: Adaptive radiation leads to the evolution of multiple species from one ancestor.
Evolution of horse is an example of:
a) Divergent evolution
b) Convergent evolution
c) Parallel evolution
d) Saltation
Answer: a
Explanation: The horse evolved gradually, showing divergent traits.
Which of the following are analogous organs?
a) Forelimbs of humans and frogs
b) Wings of insects and birds
c) Teeth of humans and monkeys
d) Arms of chimpanzee and man
Answer: b
Explanation: They have similar functions but different structures.
A connecting link between annelida and mollusca is:
a) Peripatus
b) Neopilina
c) Limulus
d) Archaeopteryx
Answer: b
Explanation: Neopilina shows features of both annelids and mollusks.
In which era did reptiles dominate?
a) Paleozoic
b) Mesozoic
c) Cenozoic
d) Archaeozoic
Answer: b
Explanation: The Mesozoic Era is known as the "Age of Reptiles".
Which group of animals evolved first?
a) Amphibians
b) Mammals
c) Invertebrates
d) Birds
Answer: c
Explanation: Invertebrates evolved before vertebrates.
Which concept explains that organs with different functions may have similar structures?
a) Homology
b) Analogy
c) Divergence
d) Mutation
Answer: a
Explanation: Homologous organs have similar structures but different functions.
Variation is essential for:
a) Photosynthesis
b) Respiration
c) Evolution
d) Digestion
Answer: c
Explanation: Variations provide the raw material for evolution.
Which of the following is an example of Lamarckism?
a) Long neck of giraffe
b) Darwin’s finches
c) Industrial melanism
d) Fossil evidence
Answer: a
Explanation: Lamarck explained the giraffe’s long neck by use and disuse.
Which theory includes "survival of the fittest" and "natural selection"?
a) Mutation theory
b) Darwinism
c) Lamarckism
d) Cell theory
Answer: b
Explanation: Darwinism is based on natural selection and survival of the fittest.