Do Now – Level 0

EMI 402

What is symbiosis?

What it means: •Two organisms of different species that live together•At least one of the organisms benefits from the relationship

Literal definition: the act of living together

What are the 3 different kinds of symbiosis?

Mutualism Parasitism

Commensalimboth

organisms benefit

one organism benefits

one organism benefits

one organism

is unaffecte

d

one organism

is harmed

MutualismMutualism A symbiotic A symbiotic

relationship in relationship in which which bothboth species benefit species benefit is called is called mutualismmutualism..

This little fish is helping me by cleaning my teeth!!! Yeah!!!

I’m eating the big fish’s food so he’s helping me too! Yeah!!!

Moray Eel with Cleaner Fish

Mutualism: both benefit

Moray Eel gets a clean mouth Cleaner Fish gets a meal

Mutualism: both benefit

Antelope with OxbirdAntelope gets rid

of parasites Oxbird gets a meal

Mutualism and flowers!

Flowers provide food for insects. Insects spread the seeds of flowers. Both organisms benefit!

Commensalism CommensalismCommensalism is a symbiotic is a symbiotic

relationship in which relationship in which oneone species species benefits and the other species benefits and the other species is is neither harmed nor benefited.neither harmed nor benefited.

Yay!! “Hakuna Matata” or Whatever!

CommensalismCommensalism

In this picture, Spanish moss isgrowing on the trees. The moss benefits because it has a place to live, and the tree doesn’t care.

Commensalism: one benefits, one is unaffected

Cattle with cattle egrets

Cattle stir up insects

as they eat grass

Egrets hang

around and eat insects

Commensalism: one benefits, one is unaffected

Clown fish with Anemone

Clown fish gets

protection from larger

fish Anemone is unaffected

ParasitismParasitism A symbiotic relationship in which a

member of one species benefits and the other species is harmed is called parasitism.

Dog and Heartworm

Heartworms are a type of worm that live inside a dog’s heart. They use that space for their house, and feed off of the nutrients inside the dog’s body. This causes the dog to get very, very sick and sometimes die.

Parasitism!!!

Parasitism: one benefits, one is

harmed

Example 6: Taenia worm in human eye

Worm infects human blood

streamHuman may go

blind

ParasitismParasitism Parasites have evolved in such a way that they Parasites have evolved in such a way that they

harm, but usually do not kill the host species.harm, but usually do not kill the host species.

Tapeworms are parasites.They attach to your intestines and suck out all of your food. the tapeworm benefits, and the host is harmed because they slowly starve to death.

One of the ways to get rid of a tapeworm is to starve yourself and then place a piece of meat in front of your mouth. The tapeworm will smell the meat and climb up your throat and out of your mouth.

Guinea Worm-Another parasite!

PredationPredation

A predator is a type of consumer. Predators seek A predator is a type of consumer. Predators seek out and eat other organisms.out and eat other organisms.

Predator

Prey

Symbiosis Video

http://www.youtube.com/watch?v=uxVMeLWzB_o