15 Genetic Engineering 416
How and why do scientists manipulate DNA in living cells?
15.1 Selective Breeding 418
15.2 Recombinant DNA 421
15.3 Applications of Genetic Engineering 428
15.4 Ethics and Impacts of Biotechnology 436
A Case of Mistaken Identity
Unit 4 Project 446
UNIT 5 Evolution 447–570
16 Darwin's Theory of Evolution 448
What is natural selection?
16.1 Darwin's Voyage of Discovery 450
16.2 Ideas that Shaped Darwin's Thinking 454
16.3 Darwin Presents His Case 460
16.4 Evidence of Evolution 465
Such Varied Honeycreepers
17 Evolution of Populations 480
How can populations evolve to form new species?
17.1 Genes and Variation 482
17.2 Evolution as Genetic Change in Populations 487
17.3 The Process of Speciation 494
17.4 Molecular Evolution 498
Epidemic
18 Classification 508
What is the goal of biologists who classify living things?
18.1 Finding Order in Diversity 510
18.2 Modern Evolutionary Classification 516
18.3 Building the Tree of Life 523
Grin and Bear It
19 History of Life 536
How do fossils help biologists understand the history of life on Earth?
19.1 The Fossil Record 538
19.2 Patterns and Processes of Evolution 546
19.3 Earth's Early History 553
Murder in the Permian
Unit 5 Project. 570