Functioning Ecosystem

Biology SSS 1 Second Term

WEEK 9

Functioning Ecosystem

Performance Objectives

Student should be able to:

1. Define autotrophy and heterotrophy
2. Define some terms under ecosystem

Content

An ecosystem is a basic functioning unit in nature. It is made up of living organisms (plants and animals) and their non-living environment. The biotic or living components such as the producers and consumers interact in their environment resulting in the ecosystem being a functional unit.

Autotrophs

Autotrophs are organisms (green plants and some bacteria) which can use sunlight or chemicals to manufacture their food from inorganic substances during the process of photosynthesis. In other words, autotrophs are organisms capable of synthesizing their food, hence they are called producers. Autotrophs provide food for the other…