MAKE A SUMMARY OF THIS BEST ANSWER GET BRAINLIST abiotic factors: nonliving
biotic factors: living organisms

Biological organization
-population: individuals of the same species that live in the same place and can produce young.

-Limiting factors:biotic or abiotic factor that restricts the number of individuals.
-Carrying capacity: the largest number of individuals that an environment can support and maintain over time.
-symbiosis:close relationship between two or more species.
-mutualism: benefits both species (lichen-->fungus and algae).
-commensalism: benefits one, but does not harm or help the other (sea anemone and clownfish).
-parasitism: benefits the parasites and harms the host (tapeworms).

-communities: groups of populations that interact with each other in a given area.
-ecosystem:biotic community and abiotic factors.
-habitat: where an organism lives.
-niche: a role of an organism in the ecosystem (worms enrich soil)
-food chain: how energy from food passes from one organism to another.
-energy pyramid: compares the trophic (energy) levels available at each level of a food chain.

Ecosystems
-ecological succession: gradual change from one community to another (dried up pond → lush forest).
biodiversity: a wide variety of different species live together in an ecosystem.
-reduction in biodiversity when species are lost
-affects the health of the ecosystem and food webs
-loss of biodiversity often caused by habitat destruction or important of species