Biology glossary

plant hormone that influences cell elongation (in phototropism), gravitropism, apical dominance, and root growth

total binding strength of a multivalent antibody with antigen

forms the central axis of the body and includes the bones of the skull, the ossicles of the middle ear, the hyoid bone of the throat, the vertebral column, and the thoracic cage (ribcage)

bud located in the axil: the stem area where the petiole connects to the stem

tube-like structure that propagates a signal from a neuron’s cell body to axon terminals

electrically sensitive structure on the cell body of a neuron that integrates signals from multiple neuronal connections

structure on the end of an axon that can form a synapse with another neuron

anti-HIV drug that inhibits the viral enzyme reverse transcriptase

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