Chapter 21, Problem 13TYU

Summary Introduction

To explain: Whether the aerobic bacteria or the photosynthetic bacteria evolved first.

Concept introduction: The Earth was formed before 4.6 billion years from the sun due to the continuous bombardment of huge rocks and ice. When Earth was formed, chemical evolution began, which led to the formation of organic molecules. Photosynthesis is a vital process in primary producers such as cyanobacteria and plants. Plants use the light energy and carbon dioxide from the atmosphere and produce sugars (which are stored in various parts of the plants) and release oxygen.