Biology CLEP

A living thing.

The basic unit of structure and function in living things.

Any change or signal in the environment that can make an organism react in some way.

An action or change in behavior that occurs as a result of a stimulus.

__________ organisms consist of many cells. Humans are __________ organisms with trillions of cells specialized to do certain tasks.

The most common chemical in cells is ___________, which is essential for life.

All organisms need ________ to power their cells.

Some organisms, called __________, can get energy from sunlight in a process known as photosynthesis.

Some organisms, called ___________, get energy by eating other living things.

A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce.