Concepts of Biology is designed for the single-semester introduction to biology course for non-science majors, which for many students is their only college-lev

Frank E. Zachos offers a comprehensive review of one of today’s most important and contentious issues in biology: the species problem. After setting the stage

Instructors consistently ask for a textbook that helps students understand the relationships between the main concepts of biology, so they are not learning fact

Darwin's theory of evolution by natural selection was based on the observation that there is variation between individuals within the same species. This fundame

Enger/Ross/Bailey: Concepts in Biology is a relatively brief introductory general biology text written for students with no previous science background. The aut