Due to decreased light penetration, which area of rivers and streams will have less diversity of plant life?
a. the source
b. the mouth
c. the middle portion
d. none of the above

The great scientist alfred wegener proposed that continents have moved, while other scientists such as t. c.chamberlin argued against wegener. wegener's ideas eventually won, and are now widely accepted, because: a) wegener's ideas were more beautiful, and so were favored by the intellectual elite. b) wegener's ideas did a better job of predicting the results of new observations and experiments. c) wegener's ideas appealed to dead white european males, whereas chamberlin's didn't. d) wegener's ideas appalled dead white european males, and we all know that in this politically correct era, dead white european males cannot get a fair shake. e) wegener won the nobel prize.

What are the answers for the following questions?

Which phrase describes the time it takes for a planet to make a complete rotation