question_answer

  A comparative anatomy and morphological evidence show the similarities and differences among the organisms of today and those that existed years ago. Explain the two ways in which these can be determined.

Answer:

The two ways in which the differences and similarities among the organisms of today and those that existedyears ago can be determined are either analogy or homology.

(i) Analogy In this, organs are functionally similar, but are anatomically different.

(ii) Homology In this, organs are structurally similar, but are functionally different.