This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: 1.1 • A living organism is distinguished from an inanimate object b the presence of a combination of characteristics • An organism is organized as structures of increasing size and complexity, from molecules, to cells, to tissues, organs, and organ systems, to individuals, populations, communities, ecosystems and the biosphere • Emergent properties arise as the level or organization of life increases and are the consequence of chemical and physical laws • Metabolism utilizes energy to support homeostasis. Energy to fuel metabolism comes from the sun or other organisms. • Life requires energy to maintain its organization and functions. Metabolism directs the acquisition and use of energy. • Organisms must maintain an internal constancy in the face of changing environmental conditions; a state called homeostasis. 1.2 • A species is a group of organisms that can successfully reproduce through several generations. Organisms use a variety of approaches to reproduction. Asexual reproduction maintains genetic information; sexual reproduction introduces new genetic changesreproduction....
View Full Document
- Spring '08
- Zoology, biosphere Emergent properties, life shares characteristics, new genetic changes