http://www.glencoe.com/sec/science/mlg/mlg.php?site=20&letter=A&language=4
Archaea – One of two prokaryotic domains
Aster – A radial array of short microtubules
that extends from each centrosome toward the
plasma membrane in a cell
undergoing mitosis
Bacreria – One of two prokaryotic domain
Cell – Life’s
fundamental unit of structure and
function
Cell wall – A
protective layer external to the plasma membrane in plant cells, prokaryotes
,fungi and some protists . In plant cells ,
the wall is formed of cellulose fibers embedded in a polysaccharide –
protein matrix. The primary wall is thin
and flexible ,whereas the secondary cell
wall is stronger and more rigid and is
the primary constituents of wood
Central vaccuole - A membrane sac in amature plant cell with diverse roles
reproduction , growth and development
Centriole - structure is an animal cell composed of cylinders of microtubule triplets arranged in a 9+0 pattern. An animal
cell usually has a pair of centrioles in cell
division.
Centromere – The centralized
region joining two sister chromatids
Centrosome – Material
present in the cytoplasm of all
eukaryotic cells , important during
cell division : the microtubule organizing center
Chromatin - The complex of DNA and
proteins that makes up a
eukaryotic chromosome. When the cell is not dividing , chromatin exists
as a mass of very long, thin fibers that are not
visible with a light microscope
Chromosome – A thread
like gene – carrying structure found in
the nucleus . Each chromosome consists
of one very long DNA molecule and associated proteins.
Cilium –
(cilia-p) A short cellular
appendage specialized for locomotion ,
formed from a core of nine outer doublet microtubules and two inner single microtubules ensheathed in an extension of plasma membrane.
Cytoplasm – The entire
contents of the cell , exclusive of the
nucleus , and bounded by the plasma membrane
Cytosol – The semi fluid portion
of the cytoplasm
Cytoplasmic streaming – A
circular flow of cytoplasm , involning myosin and actin filaments that speeds the distribution of materials within cells
Cytoskeleton – A
network of microtubules microfilaments
and intermediate filaments that branch
throughout the cytoplasm and serve a variety of mechanical and transport
functions
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