Class 12 Biology MCQ – Evolution

1. Who is often referred to as the father of the theory of evolution by natural selection?

a) Isaac Newton
b) Gregor Mendel
c) Charles Darwin
d) Albert Einstein

Answer:

c) Charles Darwin

Explanation:

Charles Darwin, along with Alfred Russel Wallace, proposed the theory of evolution by natural selection.

2. The term "survival of the fittest" was coined by:

a) Charles Darwin
b) Herbert Spencer
c) Gregor Mendel
d) Richard Dawkins

Answer:

b) Herbert Spencer

Explanation:

Herbert Spencer introduced the phrase "survival of the fittest" after reading Darwin's work.

3. Which of the following is evidence for evolution from embryology?

a) Homologous structures
b) Vestigial organs
c) Comparative embryonic development
d) Biochemical similarities

Answer:

c) Comparative embryonic development

Explanation:

Similar stages in embryonic development across different species provide evidence for common ancestry.

4. Which concept states that some evolutionary changes occur in rapid bursts followed by periods of stability?

a) Gradualism
b) Punctuated equilibrium
c) Adaptive radiation
d) Convergent evolution

Answer:

b) Punctuated equilibrium

Explanation:

Punctuated equilibrium suggests that species remain stable for long periods, interrupted by rapid evolutionary changes.

5. The hind limbs of whales are an example of:

a) Homologous structures
b) Analogous structures
c) Vestigial organs
d) Adaptive structures

Answer:

c) Vestigial organs

Explanation:

Vestigial organs are remnants of structures that served a purpose in the organism's ancestors.

6. Birds and bats have similar wing structures due to:

a) Divergent evolution
b) Convergent evolution
c) Co-evolution
d) Adaptive radiation

Answer:

b) Convergent evolution

Explanation:

Convergent evolution leads to unrelated species developing similar structures due to similar environmental challenges.

7. The theory that life originated from non-living matter is called:

a) Abiogenesis
b) Biogenesis
c) Creationism
d) Panspermia

Answer:

a) Abiogenesis

Explanation:

Abiogenesis posits that life originated from simple organic compounds.

8. Who proposed the idea that the use and disuse of organs could be passed on to offspring?

a) Charles Darwin
b) Jean-Baptiste Lamarck
c) Alfred Russel Wallace
d) Gregor Mendel

Answer:

b) Jean-Baptiste Lamarck

Explanation:

Lamarck proposed the idea of inheritance of acquired characteristics, although it has been largely discredited.

9. The structure that serves different functions but has a similar evolutionary origin is called:

a) Analogous
b) Vestigial
c) Homologous
d) Adaptive

Answer:

c) Homologous

Explanation:

Homologous structures have a common evolutionary origin but may serve different functions in different organisms.

10. Which term describes when two species evolve in response to changes in each other?

a) Adaptive radiation
b) Convergent evolution
c) Co-evolution
d) Divergent evolution

Answer:

c) Co-evolution

Explanation:

Co-evolution is when species influence each other's evolutionary pathways.

11. What does the Hardy-Weinberg principle describe?

a) Evolutionary change
b) Equilibrium in allele frequencies
c) Natural selection
d) Genetic drift

Answer:

b) Equilibrium in allele frequencies

Explanation:

The Hardy-Weinberg principle describes conditions under which allele frequencies remain constant.

12. Which mechanism of evolution occurs due to random changes in allele frequencies?

a) Mutation
b) Gene flow
c) Genetic drift
d) Natural selection

Answer:

c) Genetic drift

Explanation:

Genetic drift involves random changes in allele frequencies, especially in small populations.

13. The concept that evolution functions to increase the reproductive success of an organism is known as:

a) Survival of the fittest
b) Sexual selection
c) Fitness
d) Adaptation

Answer:

c) Fitness

Explanation:

In evolutionary biology, fitness refers to the ability to reproduce and pass on genes.

14. Which process leads to the formation of new species?

a) Speciation
b) Mutation
c) Gene flow
d) Genetic drift

Answer:

a) Speciation

Explanation:

Speciation is the evolutionary process by which new biological species arise.

15. The geographic distribution of organisms on Earth is studied under:

a) Embryology
b) Paleontology
c) Biogeography
d) Molecular biology

Answer:

c) Biogeography

Explanation:

Biogeography studies the distribution of species and ecosystems in geographic space and through geological time.

16. Which era is known as the "Age of Reptiles"?

a) Paleozoic
b) Mesozoic
c) Cenozoic
d) Precambrian

Answer:

b) Mesozoic

Explanation:

The Mesozoic era is often referred to as the "Age of Reptiles" due to the dominance of dinosaurs.

17. What do Darwin's finches illustrate?

a) Convergent evolution
b) Divergent evolution
c) Co-evolution
d) Genetic drift

Answer:

b) Divergent evolution

Explanation:

Darwin's finches are an example of divergent evolution, where one ancestral species diversified into several new species.

18. The branch of biology that studies the fossil record is:

a) Embryology
b) Biogeography
c) Paleontology
d) Ethology

Answer:

c) Paleontology

Explanation:

Paleontology deals with the study of fossils and provides evidence for evolutionary change.

19. The phenomenon where two species evolve to resemble one another is called:

a) Mimicry
b) Camouflage
c) Co-evolution
d) Adaptation

Answer:

a) Mimicry

Explanation:

Mimicry involves one species evolving to resemble another, often for protective purposes.

20. What is the ultimate source of genetic variation in a population?

a) Gene flow
b) Genetic drift
c) Mutation
d) Natural selection

Answer:

c) Mutation

Explanation:

Mutations introduce new genetic variations, which can be acted upon by natural selection.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top