Ocean-Dwelling Microorganisms Called Foraminifera Are Important in Evolutionary Studies Mainly

Multiple Choice

Ocean-dwelling microorganisms called foraminifera are important in evolutionary studies mainly because

A) the chemical composition of their shells records past temperatures.
B) they can be dated using uranium series methods.
C) primates use them as a key food source.
D) they are strong indicators of past changes in the earth's magnetic polarity.