Living things made of one cell

An aid or tool used to identify an organism

Living things made up of more than one cell

An organism that has to obtain food from an outside source for energy

Organizing organisms into groups based on similar characteristics.

Non living parts of the environment

An organism whose cells have a nucleus

An organism that is able to produce its own food to use for energy.

The smallest level of classification, these organisms can have offspring with others.

Living parts of the environment

An organism trying to maintain stable internal conditions

An organism whose cells do not contain a nucleus

The science of naming and classifying organisms

The process that organisms use to break down food into energy.

Something that causes a reaction is called a __________________.

A reaction to a stimulus is called ______________.

Process that creates new organisms.

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