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Organism

A living thing

Cell

Basic unit of structure in an organism

Unicellular

Made of a single cell

Multicellular

An organism composed of many cells

Stimulus

A change in surroundings that causes an organism to react

Response

An organism's reaction to a stimulus. An action or change in an organisms behavior.

Development

The process of change that occurs during an organism's life to produce a more complex organism

Life Cycle

All of the changes an organism undergoes during its lifetime

Life Span

The amount of time an organism can expect to live

Spontaneous generation

The mistaken idea that living organisms arise from non-living sources

Controlled Experiment

Conducted by performing 2 tests that are identical except for one factor (variable)

Autotroph

An organism that makes its own food

Heterotroph

An organism that gets energy by consuming other organisms

Homeostasis

An organism's ability to maintain stable internal conditions

Warm-blooded

Having a body temperature that stays the same

Cold-blooded

Having a body temperature that changes along with the temperature of surroundings

Metamorphosis

A process in which an animal's body changes in form

The 6 characteristics of living things

made of cells, grow and develop, use energy, respond to changes in the environment, can reproduce, are made of similar chemicals

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