Worktime: Mutualism, Parasitism, Commensalism
Closing: What's the difference?
HW: Pick your favorite of all the symbiotic relationships from today's presentation. Write whether it is an example of mutualism, parasitism, or commensalism, and explain how you know.
Announcement: Classroom Decoration Committee meeting will be held on Wednesday during lunch. At the meeting we will discuss painting the back wall of the room and rearranging the desks. Participation in the meeting counts as one of your three classroom contributions for the quarter.
Symbiosis is when two different organisms live together. Mutualism is when both organisms benefit. Parasitism is when one organism benefits but the other organism is harmed. Commensalism is when one organism lives on the other without harming it. Watch the presentation to see many examples of symbiotic relationships in nature. You can download and print the guided notes here.
