lymphocyte that matures in the bone marrow and differentiates into antibody-secreting plasma cells

soil layer that is an accumulation of mostly fine material that has moved downward

when a live virus vaccine reverts back to it disease-causing phenotype

virus that infects bacteria

statement of a chemical reaction with the number of each type of atom equalized for both the products and reactants

joint with a rounded, ball-like end of one bone fitting into a cuplike socket of another bone

molecular biology technique in which one or more short gene sequences taken from a well characterized portion of the genome is used to identify a species

tough, waterproof, outer epidermal layer of cork cells

a group of plants that probably branched off before the separation of monocots and eudicots

interconnected collections of cells in the brain that are involved in movement and motivation; also known as basal nuclei

metabolic rate at rest in endothermic animals

see basal ganglia

branch on a phylogenetic tree that has not diverged significantly from the root ancestor

molecule that donates hydroxide ions or otherwise binds excess hydrogen ions and decreases the hydrogen ions' concentration in a solution

science that seeks to expand knowledge and understanding regardless of the short-term application of that knowledge