plasma membrane		cell having a true nucleus and membrane-bound internal organelles
organ system		organisms made up of many cells that are highly specialized to perform specific functions
tissue		plant organelles that store materials, including starch, lipids, and pigments
mitochondria		the largest membrane-bound organelle; it contains the cell's DNA and manages cell functions
cell		network of microtubules and microfilaments to provide support for organelles
prokaryote		membrane-bound organelles containing enzymes that digest particles in the cell
cell wall		an instrument that magnifies specimens by passing light through the object, then through two or more glass lenses
microtubule		serves as the boundary between the cell adn its external environment
plastid		group of organs that work together to perform a major life function
cytoskeleton		cell lacking a true nucleus or membrane-bound organelles
organelle		group of cells tha function together to carry out an activity
ribosome		all living things are made of cells; the cell is the basic unit of organization; all cells come from preexisting cells
eukaryote		membrane-bound organelles that break down food molecules to produce energy-storing molecules
unicellular		folded, complex system of membranes forming a type of transport system in the cytoplasm of eukaryotic cells
electron microscope		firm, fairly inflexible structure outside the plasma membrane of plants, fungi, most bacteria, and some protists
cell theory		group of two or more tissues that perform an activity together
nucleolus		thin, hollow protein fibers present in the cytoskeleton
lysosome		chlorophyll-containing organelle found in green plants and some protists; sight of photosynthesis
nucleus		instrument that allows one to magnify, view, and photograph dead specimens by using a beam of electrons
chlorophyll		long, threadlike projection from the plasma membrane that propels cells with a whiplike motion
microfilament		membrane sacs that receive, modify, repackage, and distribute proteins in the cell
cilia		embedded in the inner membrane of chloroplasts; this green pigment traps light energy
organ		membrane-bound, fluid-filled space within the cytoplasm; temporarily stores food, enzymes, and wastes
compound light microscope		short, numerous, hairlike projections on a cell's surface; have a coordinated "beating" activity
endoplasmic reticulum		building block of all organisms
golgi apparatus		long, tangled strands of DNA found in the interphase nucleus of eukaryotic cells
multicellular		organism that carries out all its life processes within its single cell
cytoplasm		region within the nucleus that produces ribosomes
vacuole		organelles that are the site of protein synthesis
chloroplast		thin, solid protein fibers present in the cytoskeleton
chromatin		internal membrane-bound structures in a cell
flagella		clear fluid in eukaryotic cells surround the nucleus and organelles