Campbell Biology 9th Edition Chapter 2 & 3
K E Y C O N C E P T S 2.1 Matter consists of chemical elements in pure form and in combinations called compounds 2.2 An element?s properties depend on the structure of its atoms 2.3 The formation and function of molecules depend on chemical bonding between atoms 2.4 Chemical reactions make and break chemical bonds O V E R V I E W A Chemical Connection to Biology The Amazon rain forest in South America is a showcase for the diversity of life on Earth. Colorful birds, insects, and other animals live in a densely-packed environment of trees, shrubs, vines, and wildflowers, and an excursion along a waterway or a forest path typically reveals a lush variety of plant life. Visitors traveling near the Amazon?s headwaters in Peru are therefore surprised to come across