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22-3: Interactions Within an Ecosystem Niche Every organism has a niche. A niche is _____________________________________. A synonym for niche is ______________. What is your niche: at home?_______________________________ at school?_______________________________ at practice? _____________________________ Types of interactions __________________ __________________ __________________ Competition ____________________________________________________________ Resources include: food, water, and shelter Competition: How Adaptations Help A characteristic that helps an organism survive _________________________. Predator Adaptations—help to capture Prey Adaptations—help to escape Lion- __________________ Bird- __________________ Alligator- _______________ Cat- ___________________ Human-________________ Gazelle- _______________ Zebra-_________________ Tree Frog- ______________ Humans-________________ Bird-___________________ Porcupine - ____________ Skunk- ________________ Turtle- ________________ Predation An interaction in which _______________________________________________. Predator--organism that does the _________ Prey--the organism that is ______ Symbiosis is a close relationship between two species that ___________________________. 1-Mutualism : A relationship in which ______________________________. 2-Commensalism: A relationship in which _________________________________________ _________________________________________________________. 3-Parasitism: involves one organism ____________________________________________. _________: organism that benefits _______: organism that is being harmed.