corrosive rain caused by rainwater falling to the ground through sulfur dioxide gas, turning it into weak sulfuric acid; can damage structures and ecosystems

organism with optimal growth pH of three or below

animal without a body cavity

animal without a body cavity

condition caused by overproduction of GH in adults

series of biochemical reactions that the sperm uses to break through the zona pellucida

globular contractile protein that interacts with myosin for muscle contraction

ray-finned fishes

self-propagating momentary change in the electrical potential of a neuron (or muscle) membrane

energy necessary for reactions to occur

protein that binds to prokaryotic operators to increase transcription

enzyme's specific region to which the substrate binds

method of transporting material that requires energy

disease where the symptoms rise and fall within a short period of time

heritable trait or behavior in an organism that aids in its survival and reproduction in its present environment