The document provides definitions for various biology terms related to anatomy, physiology, reproduction, and ecology. It defines terms like amniotic egg, annelid, commensalism, connective tissue, detritivore, dicot, echinoderm, lichen, frond, bryophyte, endoskeleton, cuticle of a plant, 3 chambered heart, ectotherm, eukaryote, parasitism, pollinator, spore, xylem, tropism, sporophyte, bilateral symmetry, radial symmetry, porifera, nematode, seed dispersal, vestigiality, territorial behavior, mycelium, Mullerian mimicry