Question

what does dorudons, blue whales, and killer whales have in common that the other species do not?
a ability to shoot rainbows out of their eyes
b living in seawater
c underwater nursing
d tail flukes

Answer 1

Dorudons, blue whales, and killer whales all have in common **d) tail flukes**. Tail flukes are the horizontal lobes at the end of the tail that are characteristic of cetaceans (whales and dolphins), including these species. While they all live in seawater (b) and nurse their young underwater (c), not all aquatic animals share these traits. Additionally, the ability to shoot rainbows out of their eyes (a) is not true for any of these species.