Genetics is defined as: A: Branch of biology concerned with the study of genes, genetic variation, and heredity in organisms

B: Branch of biology which studies the interactions among organisms and their environment.

C: Branch of biology that integrates physical, biological, and information sciences to the study of the environment, and the solution of environmental problems.

D: Branch of biology concerned with the study of microorganisms, those being unicellular, multicellular, or acellular