Both Tuna (Fish)and Dolphins (Mammals)have a Streamlined Body Shape and Large

Multiple Choice

Both tuna (fish) and dolphins (mammals) have a streamlined body shape and large tail fins that they use to move through the water.Many other anatomical and molecular data indicate,however,that tuna and dolphins are not closely related from an evolutionary perspective.The latter data suggest that _____.

A) Anatomical data is useless for classifying evolutionary relationships
B) Organisms that live in the same environment (for example,water) will always look the same
C) Tuna and dolphins faced similar selective pressures on body shape for reproductive success
D) These organisms are,actually,closely related evolutionarily