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Form 4 Biology questions and answers on evolution

In this session, we are going to solve Form 4 Biology questions on evolution. Descriptive answers are given in video format. The questions are exam standard and useful to those preparing for KCSE exams.

Lessons (32)

• 1.    Explain why Lamarck’s theory of evolution is not accepted by Biologists today.
  0m 43s

• 2.    Give a reason why it is only mutation in genes of gametes that can influence evolution.
  0m 30s

• 3.    State three pieces of evidence that support the theory of evolution.
  0m 52s

• 4.    Discuss the various evidences, which show that evolution has taken place.
  10m 29s

• 5.    State two advantages of natural selection to organisms.
  0m 45s

• 6.    Give reason why each of the following is important in the study of evolution: (a) Fossils records. (b) Comparative anatomy.
  3m 51s

• 7.    (a) What is organic evolution? (b) State two ways in which Homo sapiens differs from Homo habilis. (c) Distinguish between divergent and convergent evolution giving example in each case.
  3m 57s

• 8.    Distinguish between analogous and homologous structures.
  1m 5s

• 9.    (a) What is the difference between Darwinian and Lamarckian theories of evolution? (b) What is meant by the following terms? Give an example in each case. (i) Homologous structures. (ii) Analogous structures. (iii) Vestigial structures.
  5m 2s

• 10.    What is meant by? (a) Organic evolution? (b) Continental drift?
  1m 19s

• 11.    Explain continental drift as an evidence of evolution.
  1m 27s

• 12.    (a) What is adaptive radiation? (b) Give a reason why organisms become resistant to drugs.
  1m 35s

• 13.    (a) What is fossil? (b) How does convergent evolution occur?
  1m 16s

• 14.    (a) (i) What is meant by vestigial structures? (ii) Give an example of a vestigial structure in human. (b) Explain why certain drugs become ineffective in curing a disease after many years of use.
  2m 6s

• 15.    (a) State two ideas proposed by Lamarck’s in his theory of evolution. (b) Why is Lamarck’s theory not acceptable?
  1m 25s

• 16.    (a) What is meant by convergent evolution? (b) State two limitations of fossils as an evidence of evolution.
  2m 43s

• 17.    Explain how comparative embryology is an evidence for organic evolution.
  1m 42s

• 18.    State the importance of divergent evolution to organisms.
  1m 10s

• 19.    (a) State the theories of evolution proposed by the following scientists. i)Charles Darwin ii)Jean-Baptise de Lamarck (b) State the evidence of evolution based on (i) Cell organelles (ii) Fossils.
  2m 24s

• 20.    Explain the theory of evolution by natural selection.
  0m 48s

• 21.    (a) Explain the role of continental drift in evolution?
  1m 10s

• 22.    (a) Name two vestigial structures in human beings. (b) Why are some bacteria able to resist the effect of antibiotics.
  1m 56s

• 23.    During a lesson, students observed the structure of bat, act and human forelimbs to determine their evolutionary relationship. (a) State the name given to the structure of the limbs observed by the students. (b) Name the type of evolution illustrated by the structure of the limbs observed. (c) What evidence of evolution is illustrated by the limbs? (d) State the significance of the type of
  2m 11s

• 24.    The diagram below illustrates the skulls of adult human and chimpanzee. (a) State one difference between the two skulls in the following structures: (b) State the significance of the evolution on the parietal bone in the chimpanzee and human skulls.
  3m 45s

• 25.    State three methods of fossil formation.
  1m 1s

• 26.    Below are diagrams representing developmental stage of three different vertebrates. (a) State the evidence of evolution illustrated by the vertebrates in the diagram. (b) Suggest why the structure labeled J has been retained throughout the evolution of fish. (c) State two major advantages evolution has given human over most of the other animals.
  2m 50s

• 27.    The diagrams below illustrates some forms of beaks in birds. (a) Which diagram represents the beak from which the others are likely to have evolved? (b) Explain your answer in (a) above.
  2m 5s

• 28.    (a) Define the term analogous structures. (b) Give two illustrations of analogous structures in mammals.
  1m 30s

• 29.    What does the term evolution mean?
  0m 39s

• 30.    (a) Explain why fossil records as evidence of organic evolution are usually incomplete?
  1m 19s

• 31.    State the benefits of mutation in living organisms.
  1m 35s

• 32.    Explain the evolutionary basis for the ever changing drugs for malaria treatment.
  1m 42s