symbiosis, ecological relationship between members of at least two different species that live in direct contact with one another, parasitism, ecological relationship in which one organism benefits by harming another organism, commenalism, ecological relationship in which one species receives a benefit but the other species is not affected one way or another, predation, the preying of one animal on others, prey, an animal that is caught and killed by another for food, mutualism, ecological relationship between two species in which each species gets a benefit from the interaction, interdependence, the dependence of two or more people or things on each other, biosphere, all organisms and the part of Earth where they exist, ecosystem, collection of organisms and nonliving things, such as climate, soil, water, and rocks, in an area, community, collection of all of the different populations that live in one area, population, all of the individuals of a species that live in the same area and the same time, habitat, combined biotic and abiotic factors found in the area where an organism lives, biotic, living things, such as plants, animals, fungi, and bacteria, abiotic, nonliving factor in an ecosystem, such as moisture, temperature, wind, sunlight, soil, and minerals, niche, the ecological role of an organism in a community especially in regard to food consumption, trophic level, level of nourishment in a food chain, producer, organism that obtains its energy from abiotic sources, such as sunlight or inorganic chemcials, carnivore, organism that obtains energy by eating only animals, predator, an animal that naturally preys on others, omnivore, organism that eats both plants and animals, decomposer, detritivore that breaks down organic matter into simpler compounds, returning nutrients back into an ecosystem, scavenger, an organism that typically feeds on refuse or carrion, nitrogen fixation, process by which certain types of bacteria convert gaseous nitrogen into nitrogen compounds, transpiration, release of vapor through the pores of the skin or the stomata of plant tissue, carrion, the decaying flesh of dead animals.

Ecology

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