Question

Homology means

• A. Same in function
• B. Same physiology
• C. Same biochemistry
• D. Same origin

Answer 1

Answer: (D)

Same origin

Homology means the structures which descent from a common ancestor. They are similar in their embryology, genetics, and anatomy but have different functions. An example of homologous structures in evolutionary biology includes the wings of bats and the arms of primates. Evolutionary theory explains the existence of homologous structures adapted to different purposes as the result of descent with modification from a common ancestor. Homologous structures are those structures, in different animals, having the same fundamental structure, but are used for different functions, e.g., homology in limb structure of vertebrates. Thus, option D is correct. Homology does not means same in general plan, physiology, and biochemistry.