Red shift
cosmic microwave background radiation
the amount of hydrogen in the universe

all indicate that the universe is
a) rotating.
b) expanding.
c) shrinking.
d) at equilibrium.

Which mechanism of transport takes place when solute particles move from a region of high concentration to a region of low concentration? active diffusion isotonic osmosis

You want to cultivate some exotic plants at your farm. however, the climate is chillier than the temperature range favorable to the crop. which is the best method to use for the cultivation of this exotic crop? a. use a crop rotation method b. use a lot of fertilizer c. prepare the seed bed properly d. use a greenhouse e. use irrigation

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates