September 10, 2013 TEST tomorrow Open journals Copy graphic organizer on board Get ready to take...
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Transcript of September 10, 2013 TEST tomorrow Open journals Copy graphic organizer on board Get ready to take...
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?