| A | B |
|---|
| an animal with a backbone | vertebrate |
| an organism at an early stage of devlopment | embryo |
| an organism that eats other organisms | consumer |
| an area occupied by animals that do not allow other members of the species to enter | territory |
| a special behavior an animal uses to find a mate | courtship |
| a type of asexual reproduction where part of an organism breaks off and develops as a new organism | budding |
| a collection of similar cells | tissue |
| an internal control of an animal's natural cycles | biological clock |
| an interaction among animals of the same species | social behavior |
| a group of tissues that carry out a special function of the body | organ |
| an animal without a backbone | invertebrate |
| a substance used fo chemical communication | pheremone |
