Glossary


 * Cell- Collection of living matter enclosed ny a barrier that separates the cell from its surroundings; basic unit of all forms of life.
 * Cell Theory- Idea that all living things are composed of cells, cells are the basic unit of structure and function in living things, and new cells are produced from existing cells.
 * Nucleus- The center of the atom which contains the protons and neutrons; in cells, structure that contains the cell's genetic material (DNA) and controls the cell's activities.
 * Eukaryote- Organism whose cells contain nuclei.
 * Prokaryote- Unicellular organism lacking a nuleus.
 * Organelle- Specialized structure that performs important cellular functions within a eukaryotic cell.
 * Cytoplasm- Material inside the cell membrame- not including the nucleus.
 * Nuclear Envolope- Layer of two membrames that surrounds the nucleus of a cell.
 * Chromatin- Granular material visible within the nucleus; consists of DNA tightly coiled around proteins.