the numbers of living organisms in an ecosystem that provide a balance between the food source and
the organisms.

all the different populations that share an ecosystem or
live together in one area.

the different populations that share an ecosystem or
live together in one area.

the long-term change in the average weather
conditions in a region and on Earth as a whole.

a relationship between species within an ecosystem for
food, space/shelter, water, sunlight, or nutrients.

organisms that break down dead plants and/or
animals to obtain energy.

a relationship between species within an ecosystem for
food, space/shelter, water, sunlight, or nutrients.

the community plus all the aspects of nonliving
(antibiotic things, such as water, air, soil, and climate.

organisms that are physically similar, mate with
one another, and produce offspring

the community plus all the aspects of nonliving
(antibiotic) things, such as water, air, soil, and climate.

species is any organism that is in immediate
danger of becoming extinct.

the death of one species. Species extinction
is final; the plant or animal

any organism that is in immediate
danger of becoming extinct.

relationship between species within an ecosystem where
one species benefits (parasite) and the other species is harmed (host).

relationship where at least one species benefits and the
other species