| A | B |
|---|
| tissue | a group of similar cells that perform the same function(p.295) |
| organ | a structure in the body that is composed to different kinds of tissue (p.295) |
| adaptation | a behavior or physical charactteristic that allows an organism to survive or reproduce in is environment (p.296) |
| sexual reproduction | a reproductive process that involves two parents that comvine their genetic matieral to produce a new organism, which differs from both parents (p.297) |
| fertilization | the joining of a sperm and an egg (p.297) |
| asexual reproduction | a reproductive process that involves only one parent and produces offspring that are identical to the parent (p.297) |
| phylum | one of the major groups into which biologists classify members of a kingdom (p.298) |
| vertebrate | an animal that has a backbone (p.299) |
| invertebrate | an animal that does not have a backbone (p.299) |
| bilateral symmetry | body plan with two halves that are mirror images (p.301) |
| radial symmetry | the quality of having many lines of symmetry that all pass through a central point (p.301) |
| larva | the immature form of an animal that looks very different from the adult (p.305) |
| cnidarian | an invertebrate animal that uses stinging cells to capture food and defend itself (p.307) |
| polyp | the cnidarian body plan is characterized by a vaselike shape and that usually adapted for a life attached to an underwater surface (p.307) |
| medusa | the cnidarian body plan having a bowl shape and adapted for a free-swimming life (p.307) |
| colony | a group of individual organisms living or growing together (p.310) |
| coral reef | a diverse environment named for the coral animals that make up its stony structure (p.310) |
| parasite | the organism that benefits by living on or in a host in a parasitism interaction (p.316) |
| host | the organism that a parasite or virus lives in or on (p.316) |
| free-living organism | an organism that does not live in or on other organisms (p.316) |
| scavenger | a carnivore that feeds on teh bodies of dead organisms (p.316) |
| anus | a muscular opening at the end o the rectum through which waste material is eliminated from the body (p.318) |
| closed circulatory system | a circulatory system in which blood moves only within a connected network of tubes called blood vessels (p.319) |
