The theory of continental drift suggests that at one time,
a. the continents were all joined into one land mass
b. there was no land on the earth
c. there was no water on the earth
d. all continents were made of ice

Nitrofurantoin used during the fifth week of pregnancy places the neonate at risk for which condition?

A60-tooth gear is connected to a 72-tooth gear. if the smaller gear turns 12 times, how many turns does the larger gear make?

19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase