Evaluate the following arguments by analogy. 1) Identify what is being compared [A], 2) relevant similarities [B] 3) whether the analogy is strong or weak [C]. 3 marks.
If a single cell, under appropriate conditions, becomes a person in the space of a few years, there can surely be no difficulty in understanding how, under appropriate conditions, a cell, may, in the course of untold millions of years give origin to the human race. (Herbert Spencer)