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A community and its physical environment together
a large scale ecosystem
all the populations of organisms living in the same environment
a place in an ecosystem where a population lives
the role each population has in its habitat
an organism in a community that must eat to get the energy it needs
a consumer that breaks down the tissues of a dead organism
a organism that makes its own food
shows the interaction among many different food chains in a single ecosystem
the way in which the organisms in an ecosystem interact with one another according to what they eat, eating the organisms below it
a long term relationship between different kinds of organism
A biome's whose main plants are grasses.
A treeless biome between the icecap and the tree line of Arctic regions, having permanently frozen subsoil.
Of or having to do with life or living organisms or produced or caused by living organisms.
An organism that lives by preying on other organisms.
An individual form of life, such as a plant, animal, bacterium.
Of, relating to, living in, or consisting of water that is not salty
a landform higher than a thousand feet
A barren biome with less than 10 inches of precipitation each year with little rainfall, extreme temperatures, and sparse vegetation.
a single organism in an environment
all the individuals of the same kind, living in the same environment
an animal that eats only plants as food
an animal that eats other animals as food
an animal that eats both plants and animals as food
an animal that is hunted, killed and eaten by a predator animal
shows the amount of energy that is available to pass from one level of the food chain to the next
a population of organisms that is likely to become extinct if steps are not take to save it
no longer in existence
a situation in which too many animals compete for the natural resources in an area
tropical rain forest
a biome with lots of rainfall, sun light, trees and warm temperatures
a biome based on trees that lose their leaves each fall
a biome made up mostly of needle-leaved evergreens, due to long winters and cold temperatures
The demand by two or more organisms for limited environmental resources, such as nutrients, living space, or light
A behavior that an organism inherits.
a behavior an animal learns from its parents
describes a population of organisms that are likely to become endangered if they are not protected
depending on each other
types and numbers of plants
determines the types and numbers of animals in an ecosystem
a situation in which the number of organisms decreases due to natural and unnatural causes
the most common cause for population decline
the amount of energy passed from one level of a food chain to another