What process is shown in the diagram below?
o
a. polymerase chain reaction
(pcr)
first
cycle
o
b. gel electrophoresis
second
cycle
o
c. karyotyping
d. use of restriction enzymes
third
cycle
fourth
cycle

the trilobite is used as an index fossil for various geologic time periods as specific types of the trilobites were present in different geological time periods. they are a group of marine arthropods belonging to the class of trilobita.

explanation:

the glands which are associated with each description is given below:

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.

actually the answer is c