Evolution Chapter-Wise Test 10

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which animal is considered a direct ancestor of modern-day amphibians?

Lobefin Fish
Ichthyosaur
Coelacanth
Tyrannosaurus
1

Lobefin fishes are considered direct ancestors of modern-day amphibians due to their limb-like fins.

What was a significant adaptation in reptiles that allowed them to dominate land environments?

Development of lungs
Viviparous reproduction
Thick-shelled eggs
Endothermic regulation
3

Thick-shelled eggs prevented desiccation, enabling reptiles to dominate terrestrial environments.

Which of the following statements is incorrect?

The first cellular life forms appeared around 2000 million years ago.
The ozone layer was formed due to the accumulation of oxygen in the atmosphere.
Chemical evolution refers to the formation of complex organic molecules from simple inorganic molecules.
Darwin proposed that life originated from non-living organic molecules.
4

Darwin did not propose the origin of life from non-living organic molecules; this was suggested by Oparin and Haldane.

Which of the following statements is correct?

Genetic recombination decreases genetic variation in populations.
Hardy-Weinberg equilibrium is disrupted by genetic drift and mutation.
Homo habilis had a brain capacity larger than Homo sapiens.
Analogous organs arise from a common ancestor.
2

Hardy-Weinberg equilibrium can be disrupted by genetic drift, mutation, selection, and gene flow.

Which of the following statements is correct?

Darwin’s theory emphasized the role of mutation in evolution.
Hardy-Weinberg equilibrium describes continuous allele frequency changes.
Homo habilis used tools, earning the title ‘handy man.’
Genetic recombination reduces genetic variability in populations.
3

Homo habilis is known for its use of tools, which contributed to its survival and development.

Which evolutionary event is associated with the extinction of dinosaurs?

Permian Extinction
Cretaceous Extinction
Triassic Extinction
Devonian Extinction
2

The Cretaceous Extinction event, about 65 million years ago, led to the extinction of dinosaurs.

Which of the following is incorrect?

Industrial melanism is an example of natural selection.
Gene flow reduces genetic differences between populations.
Lamarck’s theory is based on the survival of the fittest.
Mutation introduces new genetic variation.
3

Lamarck’s theory proposed the inheritance of acquired traits, not the survival of the fittest, which is Darwin’s concept.

Which of the following statements is correct?

Fossil records provide direct evidence of evolutionary history.
Paleontology is unrelated to evolutionary studies.
Mutation is a directed process leading to evolution.
Embryological evidence does not support evolution.
1

Fossil records provide direct evidence of evolutionary changes over time.

Which evolutionary concept is supported by the similarity in DNA sequences across diverse organisms?

Analogy
Convergent Evolution
Common Ancestry
Founder Effect
3

Similarity in DNA sequences among diverse organisms supports the concept of common ancestry.

Which type of selection favors intermediate traits, reducing variation in a population?

Disruptive Selection
Stabilizing Selection
Directional Selection
Artificial Selection
2

Stabilizing selection favors intermediate traits, reducing variation and maintaining the status quo in a population.

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