Chapter 26

Name and describe the three domains of life.

Describe shared and contrasting features of bacterial and archaeal cells.

Explain how prokaryotic cells obtain nutrients and how this process puts constraints on their size.

Describe how surface area and volume change with size.

Explain how photosynthesis can occur without the production of oxygen, and how respiration can occur without requiring oxygen.

Explain how horizontal gene transfer complicates our understanding of evolutionary relationships among bacteria and archaecan.

State the age of the Earth and the time when life is thought to have first originated.