Created By: C. Rhein Hazelwood Central Teachers Page Activity.

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Created By: C. Rhein Hazelwood Central Teachers Page Activity

WRITE IN YOUR SCIENCE JOURNAL PLEASE! §PLEASE WRITE WHAT YOU ALREADY KNOW ABOUT THESE THREE TYPES OF SYMBIOTIC RELATIONSHIPS! ( CLICK ON EACH PICTURE TO LEARN MORE!) §1. COMMENSALISM1. §2. MUTUALISM2. §3. PARASITISM3. Concept Map

COMMENSALISM §A symbiotic relationship in which one species benefits and the other species is neither harmed nor benefited. §AN EXAMPLE: In a region of Siberia in Russia a peregrine falcon and red-breasted goose have a commensal relationship. During the nesting season the falcon protects the geese from predators. The geese benefit, while the falcon is neither benefited or harmed.

MUTUALISM §A symbiotic relationship in which both species benefit! §AN EXAMPLE: Mutualism is illustrated between a type of ant and a species of acacia tree living in the subtropics. The ant protects the tree by attacking any herbivore that tries to feed on it. The ants also kill any plant that begins to grow too close to the acacia. The tree provides nectar and a home for the ants.

PARASITISM § A symbiotic relationship in which one organism benefits at the others expense! §AN EXAMPLE: Tapeworms and roundworms, live in the intestines of dogs, cats, and other vertebrates. §Why would it be disadvantageous for a parasite to kill its host?

IN YOUR JOURNAL MAKE A CONCEPT MAP LINKING All OF THESE WORDS! DO NOT FORGET LINKING WORDS! §mutualism, peregrine falcon, ant in tropics, tapeworm, commensalism, acacia tree, red-breasted goose, human intestines, symbiotic relationships, parasitism TO GRAPH

When living separately, approximately how long after the extinction of Organism 2 did it take Organism 1 to reach its highest point?

IN YOUR SCIENCE JOURNAL! After analyzing the graph, the association between the organisms is either commensalism, parasitism, or mutualism? Explain Why?

Teacher Page §For 9 & 10th grade students §The learner will be able to identify cooperation among species in a nearby ecosystem. §The learner will be able to identify and give examples of mutualism, commensalism, and parasitism. §The learner will be able to evaluate and analyze a graph. Continue

Teacher Hints: §The teacher should introduce the term symbiosis and discuss with the class before moving into each type of symbiotic relationship. §The teacher should have the students use a writing journal to write down the three types of relationships and provide examples from class discussion. §The teacher should have the students evaluate the graph and then present the question for the students to answer in their journals. Class discussion could then follow to check for understanding. § ANSWERS

ANSWERS FOR TEACHER! §A parasite cannot survive unless it is living on a host If the host dies then the parasite would not be able to live. §The first graph- It takes two weeks for Organism 1 to reach its highest point after the extinction of Organism 2. §The second graph- Parasitism is represented, because Organism 2 thrived after the extinction of Organism 1, which meant it couldn’t be mutualism or commensalism because the population would decrease due to the fact they rely on one another to thrive.