If you were to travel back in time, in what epoch would you discover the oldest modern human fossils?
pleistocene
holocene
paleocene
eocene

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2