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How diverse aspects of an organism’s environment influence the structure and function of its genes is of profound importance for understanding the molecular basis of evolution as well as the causes of disease, cancer and aging. Genes and the Environment addresses these issues from a molecular biological perspective. The author covers both natural environmental influences, such as extreme temperatures and water stress, as well as humancaused environmental influences, such as exposure to toxic chemicals. The author makes an effort to compare and contrast prokaryotic and eukaryotic systems and highlights distinctions between major groups of eukaryotes e.g., plants versus animals. to the extent that current knowledge permits. This book was written as a text for upper undergraduate students studying in the fields of biochemistry, molecular biology, biotechnology, microbiology, toxicology and environmental sciences. As such, it is relatively brief i.e., 243 pages, but touches on a wide range of timely topics.