Chapter 20.3, Problem 1NV

Summary Introduction

To determine:

Definition of the terms bioindicator, lichen, and mycorrhiza.

Explanation of Solution

Bioindicator: It is a living organism that is vital for the health of the ecosystem. The absence of bioindicators is an indicator of the presence of something which is harmful to the ecosystem.

Lichen: It is a mix of two organism algae/cyanobacterium and fungus, it functions as a single unit. It is a mutualistic interaction, where alga produces food and fungus gathers water.

Mycorrhiza: It is a symbiotic association between a root of some plants and fungi. It helps the plant to uptake phosphorus and nitrogen.