Which of the following is not a unit of air pressure?

a) millibars

b) mm hg

c) hectopascals

d) newtons

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

How did the miller-urey experiment impact the way scientists think about the origins of life? use what you know about the miller-urey experiments to discuss the factors needed for life to arise, and speculate on whether life could arise on another planet.

Name the glands associated with human digestive system