Aim: How do symbiotic relationships differ?

DO NOW1. Describe what you

see in this image.2. Do you think this

fish is being harmed? Explain why or why not.

Symbiosis

Mutualism

Crocodile & Plover Bird

Parasitism

• Parasite lives on the body of a host• Parasite benefits, host is harmed

ParasitismMosquito & Human

Dog’s Ear & Ticks

Worm in Human Eye

CommensalismWhales & Barnacles

• Barnacles get food more easily from currents that whales create in their water environment They are filter feeders!

• Whales unaffected

CommensalismCattle & Egret Birds

• As cattle eat, insects in the grass are moved around & it becomes more easy for the egret birds to feed on them

• Cattle unaffected

Brain-Pop Video

• https://www.brainpop.com/science/ecologyandbehavior/symbiosis/

Group ActivityOn loose-leaf, identify what type of symbiosis isbeing described.1. The tapeworm attaches to the intestinal wall

of the dog and uses nutrients that are absorbed by the dog .

2. The human digestive system contains bacteria which aid digestion and vitamin production.

3. The shrimp is immune to the stinging tentacles of the sea anemone and hides near it, to be protected from predators.

Individual Activity• Ants on this Acacia

Tree get nectar from the tree & the tree is protected against herbivores by the ants.

• Q: What kind of symbiotic relationship is this?

Homework

• Read txt. pgs. 39-40. Complete worksheet on identifying symbiotic relationships.