All parts of the planet inhabited by living things.
Major type of terrestial ecosystem that covers a large portion of the Earth.
A community of living and non living things in the same area.
A group of living things in the same area.
Group of the same species living in the same area.
A distinct form of life.
A living thing.
A group of organs that function together.
Perform a specific task and are made up of tissue.
A cooperating unit of similar cells that perform a specific function.
The basic unit of life.
Parts of a cell with a specific function (like a cell's organs),
A carbon based molecule.
A non-carbon based molecule.
The particle of an element.
The particles that make up an atom (protons, neutrons, and electrons).