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Name: _______________________________________________________ Date: _______________ 6th Grade Science Period: _____________ Identify the type of interaction as… Predation Competition Mutualism Parasitism Commensalism 1. Tapeworm living inside the intestines of an animal ___________________________________ 2. The cattle egret forages in pastures and fields among livestock such as cattle and horses, feeding on the insects stirred up by the movement of grazing animals. The livestock do not benefit. _______________________________________ 3. The cuckoo bird attacks another bird's nest and removes the bird's eggs. She then lays her eggs in the attacked nest and lets the unsuspecting bird raise the cuckoo's young. ___________________________________________ 4. A lynx is attacking a hare. _________________________________________ 5. Barnacles attach to the shell of a scallop and gain a place to live. The scallop is not harmed by the presence of the barnacle. __________________________________________ 6. Lichen is composed of a fungus that protects the algae while the algae provide food produced during photosynthesis. _________________________________________________ 7. The Nile crocodile open its mouth to permit the Egyptian plover feed on any leeches attached to its gums. The small bird gets to eat and the croc gets its teeth cleaned. __________________________________________ 8. Interaction is beneficial to one species and detrimental to the other. _____________________________________ 9. Cattle egrets and cow birds feed on the insects flushed out of the grass by grazing bison, cattle and other herbivores. _______________________________________ 10. One species benefits from the interaction but the other is unaffected. ______________________________________ 11. When populations of two or more species in a community rely on similar limiting resources. _________________________________________ 12. An acacia tree provides food and housing for ants while the ants kill any invading insects. ____________________________________________ 13. Sea anemones trying to occupy the same territory in a tide pool. ______________________________________________ Writing Assignment: due Monday, one paragraph. Double HW grade. Explain one interaction within an ecosystem. Give a specific example (evidence) that supports your explanation of this interaction. (This example can be anything we’ve discussed in class OR an example you would like to research on your own.) Describe how this type interaction is important to the success within the ecosystem as a whole.