A living thing; anything that can carry out life processes independently

In eukaryotic cells, the organelle that is the site of cellular respiration, which releases energy for use by the cell

An organism that consists of more than one cell

A phospholipid layer that covers a cell's surface and acts as a barrier between the inside of a cell and the cell's environment

a rigid structure that surrounds the cell membrane and provides support to the cell

An organism that consists of a single cell

In a eukaryotic cell, a membrane-bound organelle that contains the cell's DNA and has a role in processes such as growth, metabolism, and reproduction

An organelle found in plant and algae cells where photosynthesis occurs

One of the smallest bodies that are found in the cytoplasm of a cell and that are specialized to perform a specific function

In biology, the smallest unit that can perform all life processes.