fluid inside the thyroid gland that contains the glycoprotein thyroglobulin

epithelia made of cells taller than they are wide, specialized in absorption

symbiotic relationship in which one member benefits while the other member is not affected

relationship between species wherein one species benefits from the close, prolonged interaction, while the other species neither benefits nor is harmed

set of populations inhabiting a particular area

forms the hard external layer of all bones

forms the hard external layer of all bones

phloem cell that is connected to sieve-tube cells; has large amounts of ribosomes and mitochondria

no two species within a habitat can coexist when they compete for the same resources at the same place and time

type of inhibition in which the inhibitor competes with the substrate molecule by binding to the enzyme's active site

array of approximately 20 soluble proteins of the innate immune system that enhance phagocytosis, bore holes in pathogens, and recruit lymphocytes; enhances the adaptive response when antibodies are produced

measurement of the elasticity of the lung

substance composed of molecules consisting of atoms of at least two different elements

leaf in which the leaf blade is subdivided to form leaflets, all attached to the midrib

area of high concentration adjacent to an area of low concentration