An organism that consists of only one cell; also called a single-celled organism.

The basic unit of all living things; consists of a cell membrane, cytoplasm, ribosomes, and genetic material.

A large vesicle that stores water and other liquids; found in plant, fungi, and protist cells.

A protective layer made of phospholipids that covers the surface of all cells and acts as a barrier; controls what enters and leaves the cell.

A rigid structure that surrounds the cell membrane and provides support in plant, fungi, and bacterial cells (not found in animal cells).

A microscopic, single-celled, prokaryotic organism that lacks a nucleus and membrane-bound organelles.

A green organelle that contains chlorophyll and is found in plant cells; where photosynthesis occurs.

The gelatinous liquid on the interior of a cell outside of the nucleus; includes the cytosol and organelles, except the nucleus.

A material that codes for the characteristics of an organism; passed from one generation to the next; can be in the form of deoxyribonucleic acid (DNA) or ribonucleic acid (RNA).

An organelle in animal and protist cells that digests cellular waste.

The organelles that conduct aerobic cellular respiration to break down glucose to release usable energy for the cell; only found in eukaryotes.

An organism made of more than one cell (fungi, plants, and animals).

Small structures in the cell's cytoplasm that perform specialized functions.

An organism that consists of a single cell that does not have a nucleus (archaea and bacteria).

An organelle that makes proteins; some float freely in the cytoplasm while others are attached to the rough ER.

An organism made up of cells that have a nucleus; includes fungi, plants, and animals (does not include archaea or bacteria).

An organelle that contains DNA and is the control center of the cell.

Single-celled, eukaryotic organisms such as protozoans and algae