Conditions in the environment that put limits on where an organism can live

the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land

A change in a gene or chromosome.

A living part of an ecosystem

the part of Earth where life exists

the process through which populations of living organisms adapt and change

The organic circulation of carbon from the atmosphere into organisms and back again

the act of changing something for a purpose, or the result of something that has been changed

A group of individuals that belong to the same species and live in the same area

study of embryos and their development

the act of changing something for a purpose, or the result of something that has been changed

The transfer of nitrogen from the atmosphere to the soil, to living organisms, and back to the atmosphere

Any difference between individuals of the same species.

Leaving a population

A trace of an ancient organism that has been preserved in rock.

the evolution of new species

the cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment

structures that are similar in different species of common ancestry

the surroundings or conditions in which a person, animal, or plant lives or operates.

Breeding organisms with specific traits in order to produce offspring with identical traits.

An organism that is killed and eaten by another organism

A diagram that shows the amount of energy that moves from one feeding level to another in a food web

the process through which populations of living organisms adapt and change

physical, or nonliving, factor that shapes an ecosystem

Migration to a new location