Fossil evidence suggests that these three animals can be classified in the same phylum, chordata, but in three different
a) classes.
b) kingdoms.
c) divisions.
d) domains.

Fossil evidence suggests that these three animals can be classified in the same phylum, Chordata, but in three different classes. Correct A The three classes of Chordata are: Urochordata (tunicates), Cephalachordata (lancelets), and Vertebrata (vertebrates).

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.