Chapter 12, Problem 4R

Summary Introduction

Introduction

Algae refers to a diverse group of aquatic organism. It has the ability to convert sunlight into food and energy by a process called photosynthesis. In aquatic ecosystem, algae are the primary source to produce oxygen, food, and energy. It has the ability to absorb nutrients and other trace metals. Lichen is a combination of both algae and fungi occurring in in a symbiotic relationship. Lichens act as a major source in ecosystem to produce soil, source of nitrogen and habitat for other organism.