1. Symbiotic Relationships
February 17th 2016

2. Shape of the Day
10 – 15 minutes – Run through lecture at breakneck speed
Rest of Block – Organism Research in Library

3. Learning Objectives Define symbiosis
Define and give examples of parasitism, commensalism and mutualism

4. Symbiosis
When two organisms share a close relationship, where at least one benefits

5. Parasitism
Where one party benefits and the other suffers
+ / -

6. Parasitism
Where one party benefits and the other suffers
+ / -

7. Parasitism Parasites usually don’t kill their hosts, why not?
Because from an evolutionary standpoint, if the hose dies, the parasites die as well.

8. Parasitism
Unless the parasites have already reproduced.

9. Commensalism
When one party benefits and the other is unaffected
+ / 0

10. Mutualism
When both parties benefit
+ / +