Author Question: The world's desert regions ____. a. have always had arid climates b. are 99 covered by active ... (Read 80 times)

crobinson2013 · **on:** Jul 13, 2018

The world's desert regions ____.

a. have always had arid climates
b. are 99 covered by active sand dunes
c. are fragile environments
d. have no vegetation

Question 2

On land, a traveler would notice a decrease in primary productivity by traveling from the tropics to the higher latitudes.

Indicate whether the statement is true or false