The most common cause of desertification is

a. the construction of dams
b. overgrazing
c. mining
d. drought

25. what does meiosis create? haploids or diploid? somatic cells or gametes?

Which gas found in the earth's atmosphere greatly impacts the daily range of temperature on earth. a) oxygen b) hydrogen c) nitrogen d) water vapor

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?