Oct 7th, 20008 Homework

organelle - each part of a cell with a specific job to do (meaning "mini-organ")


plasma membrane - both kinds of cells have a thin outer covering


nucleus - houses the cell's genetic material in the form of DNA



cytoplasm - the entire region of the cell between the nucleus and the plasma membrane


cell wall - protects the plant cell and maintains its shape


prokaryotic cell - lacks a nuclus and most other organelles


eukaryotic cell - has a nuclus surrounded by its own membrane, and has other internal organelles bounded by membranes


diffusion - the net movement of the particles of a substance from where they are more concentrated to where they are less concentrated


equilibrium - something in balance


selectively permeable membrane - allows some substances to cross the membrane more easily than others and blocks the passage of some substances altogether