In teaching explain some of the difficulties you faced and ways in which you rose above the difficulties and met the challenge.

i took a test for bio that had this question and these were the correct answers, not sure if this is any now lol

the nervous system and the muscular system work together.  

sweat reaches the surface of the skin and evaporates into the air.

muscles underneath the skin relax, causing hair on the skin to lay flat.

of this it had caused the environment to greatly changed, and also caused many animals to adapt.