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(a) Convergent evolution is a phenomena where different structures of different embryonic origin evolve to perform same functions e.g. Wings of insects/ birds, eye of human being and octopus
(b) - Missing links since many fossils have not been excavated
- Distortion of parts during sedimentation
- Destruction of fossils by geological activities.
- Many fossils have not been discovered
johnmulu answered the question on May 19, 2017 at 04:49
- (a) State two ideas proposed by Lamarck in his theory of evolution.
(b) Why is Lamarck's theory not acceptable? (Solved)
(a) State two ideas proposed by Lamarck in his theory of evolution.
(b) Why is Lamarck's theory not acceptable?
Date posted: May 15, 2017. Answers (1)
- (a) (i) What is meant by vestigial structures?
(ii) Give an example of a vestigial structure in human.(Solved)
(a) (i) What is meant by vestigial structures?
(ii) Give an example of a vestigial structure in human.
Date posted: May 15, 2017. Answers (1)
- (a) What is fossil?
(b) How does convergent evolution occur?
(Solved)
(a) What is fossil?
(b) How does convergent evolution occur?
Date posted: May 15, 2017. Answers (1)
- (a) What is adaptive radiation?
(b) Give a reason why organisms become resistant to drugs. (Solved)
(a) What is adaptive radiation?
(b) Give a reason why organisms become resistant to drugs.
Date posted: May 15, 2017. Answers (1)
- Explain continental drift as an evidence of evolution. (Solved)
Explain continental drift as an evidence of evolution.
Date posted: May 13, 2017. Answers (1)
- What is meant by
(a) Organic evolution?
(b) Continental drift? (Solved)
What is meant by
(a) Organic evolution?
(b) Continental drift?
Date posted: May 13, 2017. Answers (1)
- Give reason why each of the following is important in the study of evolution:
(a) Fossils records.
(b) Comparative anatomy. (Solved)
Give reason why each of the following is important in the study of evolution:
(a) Fossils records.
(b) Comparative anatomy.
Date posted: May 13, 2017. Answers (1)
- State two advantages of natural selection to organisms. (Solved)
State two advantages of natural selection to organisms.
Date posted: May 13, 2017. Answers (1)
- State three pieces of evidence that support theory of evolution(Solved)
State three pieces of evidence that support theory of evolution
Date posted: May 13, 2017. Answers (1)
- Give a reason why it is only mutation in genes of gametes that can influence evolution.(Solved)
Give a reason why it is only mutation in genes of gametes that can influence evolution.
Date posted: May 13, 2017. Answers (1)
- State two advantages of hybrid vigour. (Solved)
State two advantages of hybrid vigour.
Date posted: May 13, 2017. Answers (1)
- (a) What is meant by the term genetics
(b) State two examples of discontinuous variation. (Solved)
(a) What is meant by the term genetics
(b) State two examples of discontinuous variation.
Date posted: May 13, 2017. Answers (1)
- State three structural differences between DNA and RNA. (Solved)
State three structural differences between DNA and RNA.
Date posted: May 13, 2017. Answers (1)
- Differentiate between phenotype and genotype as used in genetics (Solved)
Differentiate between phenotype and genotype as used in genetics
Date posted: May 13, 2017. Answers (1)
- (a) What is meant by the term sex linked genes?
(b) Name two sex linked traits in human beings. (Solved)
(a) What is meant by the term sex linked genes?
(b) Name two sex linked traits in human beings.
Date posted: May 13, 2017. Answers (1)
- (a) Differentiate between the following terms: (i) Dominant gene and recessive gene;
(ii) continuous variation and discontinuous variation.
(b) What would be the expected results from a test cross? (Solved)
(a) Differentiate between the following terms: (i) Dominant gene and recessive gene;
(ii) continuous variation and discontinuous variation.
(b) What would be the expected results from a test cross?
Date posted: May 13, 2017. Answers (1)
- (a) What is meant by the term non-disjunction?
(b) Give an example of genetic disorder caused by: (i) Non-disjunction; (ii) Gene mutation. (Solved)
(a) What is meant by the term non-disjunction?
(b) Give an example of genetic disorder caused by: (i) Non-disjunction; (ii) Gene mutation.
Date posted: May 13, 2017. Answers (1)
- State two advantages of hybrid vigour (Solved)
State two advantages of hybrid vigour
Date posted: May 13, 2017. Answers (1)
- (a) What is meant by the following terms (i) hybrid vigour (ii) Polyploidy?
(b) State two causes of chromosomal mutations. (Solved)
(a) What is meant by the following terms (i) hybrid vigour (ii) Polyploidy?
(b) State two causes of chromosomal mutations.
Date posted: May 13, 2017. Answers (1)
- (a) What is meant by non-disjunction?
(b) Give two examples of continuous variation in humans(Solved)
(a) What is meant by non-disjunction?
(b) Give two examples of continuous variation in humans
Date posted: May 13, 2017. Answers (1)