Course: Science Subtest II
Lesson: Ecology
Topic: Interactions Within and Among Ecosystems      Page 1 of 18  

Diagnostic Question



1. The bacteria living in your intestine thrive on its nutrient rich environment. They also produce several vitamins necessary for your good health. This is an example of:

ACompetition
BCommensalism
CParasitism
DCompetitive exclusion
EMutualism