1. AGENDA – 4/6/15 Review Symbiosis – bellringer Discuss Succession and Limiting Factors Practice Succession Homework: Quiz over Symbiosis tomorrow!

2. Let’s Practice! Symbiotic Relationships

3. Acacia Plant & Ants The ants lay eggs on acacia tree so they get a nice safe place for their eggs. The acacia covers the infected area with brown flesh (called a gall.) The plant has to use valuable resources to create the gall. What symbiotic relationship is this? parasitism

4. Boxer Crab & Anemones This Boxer Crab carries a pair of stinging anemones in its claws, which it uses to defend itself from predators. The anemones get to move around which increases their food supply. mutualism What symbiotic relationship is this?

5. This tiny emperor shrimp is riding along on the back of a sea cucumber (a long worm-like starfish relative) while it crawls along a sandy bottom. The shrimp gets to travel around under the protection of its much larger partner, and the sea cucumber doesn't seem to mind. Emperor Shrimp & Sea Cucumber commensalism What symbiotic relationship is this?

6. Cattle & Cattle Egrets As these cattle walk around eating grass they stir up lots of insects. The egrets hang around and get a yummy meal of insects. What symbiotic relationship is this? commensalism

7. Loa Loa Worm & Human This worm infects human the blood stream and gets a nice warm safe home there. The human may go blind or have other complications as a result. What symbiotic relationship is this? parasitism

8. Goby and Alpheid Shrimp What symbiotic relationship is this? mutualism This alpheid shrimp (on the right) uses its strong claws like a bulldozer to create a burrow in the sand. The shrimp is nearly blind. It relies upon its partner, the sharp-eyed goby, to warn of danger. When a potential predator approaches, both animals disappear quickly into the burrow

9. Let’s Review 1.What is symbiosis? 2.What are the different kinds of symbiosis? 3.Describe one example of each kind of symbiotic relationship. Answer each of following questions in your journal.