Baboon: Primate mammalian with an elongate, dog like muzzle with nostrils at the tip.  The head is large and they walk on all toes. Also known as dog-faced monkeys.

Bacca: A berry formed from an inferior ovary.

B-Lymphocyte: Kind of lymphocyte originating from bone marrow. The precursor of the plasma cells that secrete antibody. See T-lymphocyte.

Bacillariophyta: The diatoms. Division of algae. Microscopic, unicellular plants, occurring singly or grouped into colonies. In addition to chlorophylls a and c Chloroplasts contain carotene and xanthophylls including fucoxanthin.
Cell wall of pectic materials impregenated with silica finely sculptured; composed of two halves, one of which overlaps the other. Asexual reproduction by cell division, sexual reproduction isogamous. Abundant in marine and fresh water plankton and benthos. With dinoflagellates and a few other algae provide basis for all life in sea.