From the constructions of genes to the coded instructions stored in DNA, living bodies can be complicated. How are traits passed from parents to offspring? And how have organisms evolved over time? Discover the secrets of chromosomes, coevolution, meiosis, natural selection, and meet the great thinkers who made these discovers possible. Extraordinary photos and real-world examples invite readers to discover the world of biology, while an encyclopedic-entry-style format makes the text approachable and highly browsable. Final comprehension questions engage readers to check what they have learned to reenforce comprehension.