Protists Are Considered to Represent an Artificial Kingdom Rather Than

Multiple Choice

Protists are considered to represent an artificial kingdom rather than an evolutionary lineage because

A) no single clade can combine all the species currently grouped within the kingdom.
B) both prokaryotic and eukaryotic species have been assigned to the kingdom.
C) they evolved recently and the members routinely hybridize with one another.
D) all of the species included within the grouping are believed to have descended from a single common ancestor.