Which organisms are capable of surviving as a single cell

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

What is the vapor pressure of a solution with a benzene to octane?