7.5.4 Body Structure AdaptationsAll living creatures need to satisfy the six basic needs of life: get food, get water, protect themselves from the environment, protect themselves from other organisms, get air (oxygen), and reproduce.

Every single body structure adaptation and behavior must help the organism satisfy one of these basic needs of life. For example, a turtle's shell has evolved over millions of years to help them protect themselves from their predators and a whale's blowhole helps it obtain oxygen easily when it surfaces.

Check out these other strange animals and note their peculiar body structure adaptations. (The one above is the axolotl from Mexico.) What basic needs are satisfied?

http://webecoist.com/2009/02/03/the-9-strangest-animals-on-earth/

http://listverse.com/nature/top-10-strangest-animals/