archaeans were first discovered in the a 1870s b 1970s c 1950s d 1800s

archaeans were first discovered in the

a 1870s

b 1970s

c 1950s

d 1800s

Brief Explanations

Archaea were first discovered in the 1970s by Carl Woese and his colleagues through molecular - phylogenetic analysis.

B. 1970s