Cell The basic unit of structure and function

Cell The basic unit of structure and function in living things Tissue A group of similar cells that perform the same function Organ A structure of the body composed of different kinds of tissue Adaptation A behavior or physical characteristic that allows and organism to survive or reproduce in its environment Sexual Reproduction Reproductive process that involves two parents that combine their genetic material to produce a new organism different from both parents

Fertilization The joining of the sperm and egg Asexual Reproduction Reproductive process that involves one parent and produces offspring that are identical to the parent Phylum One of the major groups into which biologists classify members of a kingdom Vertebrate An animal that has a backbone Invertebrate An animal that does not have a backbone

Bilateral Symmetry Radial Symmetry Body plan with two halves that are mirror images The quality of having many lines of symmetry that all pass through a central point Larva The immature form of an animal that looks very different from the adult Cnidarian An invertebrate animal that uses stinging cells to capture food and protect itself Polyp Cnidarian body plan with a vase like shape, usually adapted for life attached to an underwater surface

Medusa Cnidarian body plan having a bowl like shape and adapted for free swimming life Colony A group of individual organisms living or growing together Coral Reef A diverse environment named for the coral animals that make up its stony structure Parasite An organism that benefits by living on or in a host organism in a parasitic interaction Host The organism that a parasite or virus lives in or on

Free Living Organism An organism that does not live in or on other organisms Scavenger A carnivore that feeds on the bodies of dead organisms Anus The muscular opening at the end of the rectum through which waste material is eliminated from the body Closed Circulatory System A circulatory system in which blood moves only within a connected network of tubes called blood vessels