Environmental 1.3

Orchids grow in tree branches. The orchids receive light, and their roots get water from the air.

Commensalism

Small mites live on your skin, eating dead skin cells.

Commensalism

Tapeworms live in the intestines of cats, where they absorb nutrients from the food the cats eat.

Parasitism

limiting factor

a part of the environment that keeps a population's size at a level below its full potential

commensalism

a relationship between two organisms in which one organism benefits and the other is unaffected

Mutualism

a relationship between two species in which both species benefit

Parasitism

a relationship between two species in which one species, the parasite, benefits from the other species, the hose, which is harmed

Symbiosis

a relationship in which two different organisms live in close association with each other

Predator

an organism that east another organism

Prey

an organism that is killed and eaten by another organism

Barnacles attach themselves to the shells of crabs. The barnacles receive a home and transportation.

commensalism

Bees use a flower's nectar for food, and they carry a flower's pollen to other flowers, allowing the flowers to reproduce.

mutualism

Clownfish live among the poisonous tentacles of a sea anemone. The clownfish are protected from predators, and they keep the sea anemone clean.

mutualism

Dutch elm disease has caused mass destruction of elms. The fungus feeds on materials produced by the elm trees.

parasitism

Carrying capacity

the largest population an environment can support

cooperation

when individuals work together

competition

when two or more individuals or populations try to use the same limited resource