Front

organism

Back

a living thing

Front

cell

Back

the basic unit of structure and function in living things

Front

unicellular

Back

made of a single cell

Front

multicellular

Back

consisting of many cells

Front

stimulus

Back

a change in an organism's surroundings

Front

response

Back

a behavior an organism takes when it reacts to a stimulus

Front

development

Back

produces a more complex organism

Front

spontaneous generation

Back

the mistaken idea that living things arise from nonliving sources

Front

autotroph

Back

an organism that makes its own food

Front

heterotroph

Back

an organism that cannot make its own food