| A | B |
|---|
| cell | The basic unit of structure and function |
| tissue | A group of similar cells that perform a specific function |
| organ | A group of several different tissues that form a function |
| adaptations | Structures or behaviors that allow an organism to perform basic functions in their environment |
| sexual reproduction | Process by which a new organism develops from the joining of two sex cells- a male sperm cell and a female egg cell |
| fertilization | The joining of a sperm cell and an egg cell |
| asexual reproduction | Process by which a single organism produces a new organism identical to itself |
| phylum | Biologists have classified animals into about 35 major groups |
| vertebrates | Animals with backbones |
| invertebrates | Animals without backbones |
| bilateral symmetry | one line that divides an object into halves that are mirror images |
| radial symmetry | Many lines of symmetry through an object's central point |
| lava | An immature form of an animal that looks very different from the adult |
| cnidarians | invertabrates that have stinging cells and take food into a central cavity |
| polyp | Cnidarian with a vase shaped body structure; its mouth is on top |
| medusa | Cnidarian with a bowl like shaped body with a mouth on the bottom and tenticles that help is swim e.g. jelly fish |
| colony | A group of many individual animals |
| coral reef | structure made by coral polyps that have died and left their hard stony skeleton |
