Biology, Eighth Edition (Raven)

Chapter 26: The Tree of Life

Learning Outcomes

• Understand the properties that are both necessary and sufficient to describe life.
• Know the experimental evidence that supports the evolution of carbon based life on earth.
• Describe the changes that have occurred in the earth’s atmosphere over the last 4.5 billion years.
• Explain the importance of biological bubbles to the origin of cells.
• Compare and contrast fossil bacteria, archaebacteria, and other present day eubacteria.
• Know how eukaryotes differ from prokaryotes.
• Delineate the current six kingdom system of classification.
• Be able to support or refute the existence of life elsewhere in the universe.