How do nerves pass along messages to and from the brain?

What two fields of study provide the core information that is used to classify organisms?

Which sentence is an example of a strong conclusion to an autobiography? a. i stayed after school three days in a row to practice onstage in the auditorium. b. i knew i would have to practice all week to memorize my dance for the recital. c. after the recital was over, i knew practicing was worth it, and i was looking forward to my next big challenge. d. on opening night, i danced in front of a packed auditorium.

What was the land like over 500 million years ago? what was under the sea?