Animals Crossword

2. behavior that has been learned from experience or from observing other animals
4. an area that is occupied by one animal or by a group of animals that do not allow other members of through species to enter
5. the control center of some animals
7. an internal control of an animal's natural cycles
9. part of an organism breaks off and develops into a new organism
11. a special behavior that help them find a mate
12. An animal that needs a backbone
14. the way that some animals get nutrients throughout the body
17. made of many cells
18. animals without backbones
19. animals that eat other animals
21. fixed objects that an animal uses to find its way
22. a signal must travel from one animal to another, and the receiver of the signal must respond in some way
24. collections of similar cells
26. group of tissues that carry out a special function
27. an organism at an early stage

1. the interaction among animals of the same species
3. has a nucleus
6. cells develop into different kinds of cells
8. the animal being eaten
10. behavior that doesn't depend on learning or experience is known as innate behavior
11. daily cycles that biological clocks keep track of
13. to travel from one place to another
15. the natural force of evolution
16. a period of inactivity and decreased body temperature that some animals experience in winter
20. a period of of inactivity and decreased body temperature that some animals experience in summer
23. when a animals run from enemies, search for food, battle for territory and build homes
25. organism that eats other organisms