the branch of biology that deals with the relations of organisms to one another and to their physical surroundings
the regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms
living things in their ecological relations
physical rather than biological; not derived from living organisms
all the inhabitants of a particular town, area, or country
all the interacting populations of different species that live in the same geographical location at the same time
a biological community of interacting organisms and their environment
a large naturally occurring community of flora and fauna occupying a major habitat
the natural home or environment of an animal, plant, or other organism
role, or position, of an organism in its environment
act of one organism feeding on another
close mutualistic, parasitistic, or commensal association between 2 or more species that live together
symbiotic relationship where both species benefit
symbiotic relationship in which one organism benefits and the other is neither helped nor harmed
symbiotic relationship where on organism benefits at the expense of another
individual - population - community - ecosystem - biome - biosphere
order from most specific to broadest
individual / organism
any unicellular or multicellular form (with the characteristics of living things)
a number of organisms present in a given population at a given time
number of individuals within a population per unit area
producer/consumer, predator/prey, parasite/host
3 main types of feeding relationships
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