. Which two ideas did Darwin use to explain evolution? gene pools and common descent modern synthesis and natural selection natural selection and common descent acquired traits and modern synthesis

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully

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.