Free Evolution MCQs with Answers
814 Evolution MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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Read the Evolution notesFree MDCAT chapter notes with key terms814 questions · page 16 of 41
301. Evolution is a
- A. Change of shape of body
- B. Change of body form
- C. Change of gene frequency
- D. Change of body organs
Explanation: Evolution refers to the processes that have transformed life on earth from its earliest forms to the vast diversity that we observe today
Correct answer: Change of body form- A. High concentration of CO2 in atmosphere
- B. High concentration of O2 in atmosphere
- C. Limited supply of nutrient sources
- D. High temperature in the primitive environment
Explanation: Explanation for this question will be added soon
Correct answer: High concentration of O2 in atmosphere- A. A character inherited by an organism
- B. It can pass from parent to offspring
- C. It never passes from parent to offspring
- D. It provides raw material for evolution
Explanation: Acquired character, in biology, modification in structure or function acquired by an organism during its life, caused by environmental…
Correct answer: It never passes from parent to offspring- A. Cellular body which produce energy
- B. Anaerobic bacteria which produces energy
- C. Aerobic bacteria which produces energy
- D. Photosynthetic bacteria undergoes photosynthesis
Explanation: According to this hypothesis, the aerobic bacteria developed into mitochondria, which are the sites of aerobic respiration and most energy…
Correct answer: Photosynthetic bacteria undergoes photosynthesis- A. Cellular body which produce energy
- B. Anaerobic bacteria which produce energy
- C. Aerobic bacteria which produce energy
- D. Photosynthetic bacteria undergoes photosynthesis
Explanation: Ingestion of prokaryotes that resembled present-day cyanobacteria could have led to the endosymbiotic development of chloroplasts in plants.
Correct answer: Aerobic bacteria which produce energy- A. They do not resemble with other species
- B. They show resemblance with the South American species
- C. They have ancestors only in Galapagos
- D. None of the above
Explanation: Most of the animal species on the Galapagos live nowhere else in the world, although they resemble species living on the South American…
Correct answer: They show resemblance with the South American species307. Neo-Darwinism means:
- A. Concept of evolution on the basis of population genetics
- B. Concept of evolution on the basis of Mendalism
- C. Concept of evolution on the basis of natural selection
- D. All of the above
Explanation: A comprehensive theory of evolution that became known as the modern synthesis or Neo-Darwinism was developed in the early 1940s.
Correct answer: All of the above- A. Have same structures but different functions
- B. Have same functions but different structures
- C. Have different structures and function
- D. None of the above
Explanation: Homologous organs are functionally different but structurally alike e.g. Fore limbs of man, bat, horse, whale etc.
Correct answer: Have same structures but different functions- A. Have same structures but different functions
- B. Have same functions but different structures
- C. Have different structures and functions
- D. None of the above
Explanation: Analogous organs are functionally alike but structurally different e.g. wings of bat, birds and insects etc.
Correct answer: Have same functions but different structures- A. Fossil evidence suggest early eukaryotes ate Proteobacteria
- B. Free-living mitochondria still exist in some environments
- C. Mitochondria and chloroplasts have their own DNA
- D. All of the above are true
Explanation: The evidence to support the endosymbiotic theory is that mitochondria and chloroplast have their own DNA and are capable of reproducing…
Correct answer: Mitochondria and chloroplasts have their own DNA- A. Most organisms on Earth use RNA as their genetic material
- B. The simplest life forms, viruses, use RNA
- C. RNA is more stable than DNA
- D. RNA has the ability to catalyze a few simple, chemical reactions
Explanation: RNA is the first genetic material in cells because: RNA is capable of both storing genetic information and catalyzing chemical reactions.
Correct answer: The simplest life forms, viruses, use RNA- A. 0.023%
- B. 0.059%
- C. 0.015%
- D. 0.034%
Explanation: Explanation for this question will be added soon
Correct answer: 0.023%- A. 1260
- B. 1620
- C. 100
- D. 1001
Explanation: Explanation for this question will be added soon
Correct answer: 1620- A. 79.56%
- B. 86%
- C. 92.15%
- D. 22.54%
Explanation: Explanation for this question will be added soon
Correct answer: 79.56%- A. 42%
- B. 20%
- C. 30%
- D. 0%
Explanation: Explanation for this question will be added soon
Correct answer: 42%- A. 5
- B. 6
- C. 0
- D. 1
Explanation: Explanation for this question will be added soon
Correct answer: 1- A. 20%
- B. 60%
- C. 80%
- D. 10%
Explanation: Explanation for this question will be added soon
Correct answer: 80%- A. 22%
- B. 24%
- C. 26%
- D. 32%
Explanation: Explanation for this question will be added soon
Correct answer: 32%- A. 0.355
- B. 0.620
- C. 0.0222
- D. 0.156
Explanation: Explanation for this question will be added soon
Correct answer: 0.156- A. 0.216
- B. 0.316
- C. 0.116
- D. 0.416
Explanation: Explanation for this question will be added soon
Correct answer: 0.416