Evolution Chapter-Wise Test 7

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What evolutionary process results from reproductive isolation over time?

Adaptive Radiation
Speciation
Genetic Drift
Co-evolution
2

Speciation occurs when reproductive isolation leads to the formation of new species over time.

Which example illustrates divergent evolution?

Wings of butterfly and bird
Forelimbs of mammals
Eyes of octopus and mammals
Flippers of penguin and dolphin
2

Forelimbs of mammals illustrate divergent evolution, where similar structures adapt for different functions.

Which of the following is incorrect?

Darwin’s finches are an example of adaptive radiation.
Panspermia suggests that life came from outer space.
Industrial melanism is unrelated to natural selection.
Mutation introduces new alleles into a population.
3

Industrial melanism is an example of natural selection, not unrelated to it.

Which of the following statements is correct?

Homo erectus had a smaller brain capacity than Homo habilis.
Natural selection does not influence allele frequencies in populations.
Paleontology provides evidence for evolutionary changes over time.
Analogous organs have similar structures but different functions.
3

Paleontology, the study of fossils, provides direct evidence of evolutionary changes and extinct species.

Which phenomenon explains the rapid diversification of species from a common ancestor into various ecological niches?

Adaptive Radiation
Punctuated Equilibrium
Genetic Drift
Founder Effect
1

Adaptive radiation refers to the evolution of different species from a common ancestor, each adapting to different environments.

Which of the following is correct?

Darwin’s finches are an example of convergent evolution.
Homo habilis had a larger brain capacity than Homo sapiens.
Natural selection enhances survival of advantageous traits.
Paleontology is the study of genetic mutations.
3

Natural selection enhances the survival and reproduction of individuals with advantageous traits.

Which of the following pairs represents analogous structures?

Thorns of Bougainvillea and tendrils of Cucurbita
Forelimbs of whale and bat
Wings of bat and butterfly
Flippers of whale and dolphin
3

Wings of bat and butterfly are analogous structures, performing similar functions but having different structural origins.

Which of the following is incorrect?

Fossils provide direct evidence of evolutionary history.
Mutation is the only source of genetic variation.
Gene flow reduces genetic differences between populations.
Hardy-Weinberg equilibrium is maintained in the absence of evolutionary forces.
2

Mutation is not the only source of genetic variation; recombination and gene flow also contribute to genetic diversity.

What is the significance of fossil records in the study of evolution?

They provide evidence of speciation events.
They confirm the presence of genetic mutations.
They illustrate gene flow between populations.
They show the Hardy-Weinberg equilibrium.
1

Fossil records provide direct evidence of speciation events and evolutionary changes over time.

Which process leads to the formation of new alleles in a population?

Natural Selection
Mutation
Gene Flow
Genetic Drift
2

Mutations are random changes in the genetic material that lead to the formation of new alleles in a population.

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