.........is a periodic group movement that is characteristic of a population or species.

........is defined as behavior that might decrease individual fitness but increase the fitness of others.

..........is a transfer of a signal or message from one animal to another that results in some type of response.

biological rhythm is one based on the tides and is called a .........cycle.

Some animals gain protection by looking like a dangerous animal. This strategy is called ...........

Bright colors often serve as a warning that an animal is poisonous. This is called ..........

There are many ways animals can communicate, including: ................

Some animals release chemicals called ...........that cause individuals of the same species to react in a predictable way.

..............is a period of inactivity and lowered body temperature that some animals undergo in the winter as protection against the cold weather and lack of food.