Term Definition
predator An organism, usually an animal, that kills another organism for food.
prey An organism that is hunted and eaten by another organism.
photosynthesis the process in which plants and some other organisms use the energy in sunlight to make food.
chlorophyll a green pigment that traps energy from the sun.
symbiosis The relationship between two organisms or species that live together in an environment.
host An organism that is infected by a parasite.
parasite An organism that lives in or on another organism (the host) and obtains nourishment from the host but provide nothing back to that host.
environment All the living and nonliving things that surround an organism.
resource A naturally material in or on Earth’s crust or atmosphere of potential use to humans.

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