September 10, 2013

TEST tomorrow

Open journals

Copy graphic organizer on board

Get ready to take notes on symbiotic relationships

Parasite Terminology

• Parasite – an organism that lives in or on another organism, generally without killing it. It comes from the Greek “one who eats off the table of another”. Ichneumon wasps are parasites on caterpillars.

Parasite Terminology

• Host – the organism which is the home and/or food source for the parasite

• The host is harmed!

Parasite Terminology

• Intermediate Host – a secondary host in which the parasite matures.

• The intermediate host for cat tapeworm is the flea.

Tapeworm Intermediate host/vector

Parasite Terminology

• Vector – how the parasite gets from host to host (usually an arthropod). The parasite may develop into the infective state while in the vector.

Microsoft Clip Art

Heartworm

• Mosquitoes are the vector for dog heartworm

• Heartworm belongs to

the roundworm phylum

http://www.secondchanceboxer.com/heartworm.jpg

Sample Life Cycle: The Guinea Worm

What can a parasite do to you?

Ichneumon wasp larva, having lived on caterpillar tissue, are now pupating on the outside. They eat in such a way as to avoid major organs, keeping their host alive.

http://homeharvest.com/homeharvest2000pics/parsitizedcaterpillersm.jpghttp://homeharvest.com/homeharvest2000pics/parsitizedcaterpillersm.jpg

Onchocerciasis

River blindness is

caused by a

roundworm and

transmitted by

black flies

Variations on Parasitism

o Parasitism – when one organism benefits from the relationship, and the other is harmed.

o Type of symbiotic relationshipo Other symbiotic relationshipso Mutualismo Commensalism

September 11, 2013

Please clear your desk and have your pencil ready for your TEST

After TEST, check your answers!

Turn in test, open journal and copy the graphic organizer.

Symbiotic Relationships

Mutualism - both organisms benefit from the relationship.

Commensalism – one of the organisms benefits. The other is neither harmed or helped.

viridescens) creates feeding opportunities for smaller fish by moving large rocks too big for them to shift themselves.

Science Journal – 9-5-13

1. Is this relationship parasitism or commensalism?

2. Why do you say so?