Why are blue whales so enormous?

two times larger than the biggest dinosaurs.

as big as the biggest dinosaurs.

60 times the size of the biggest dinosaurs.

five times larger than the biggest dinosaurs.

exclusively on krill

only one time per day

on a variety of small crustaceans (including shrimp, lobster, krill, and crabs)

only on kelp

100%; its mouth stretches the length of it's body

50%; its mouth is about the size of a swimming pool

125%; its accordion-like mouth stretches to its bellybutton

150%; its jaws open much like that of a snake

250,000;

10,250

480,000;

1,900

100,000;

150

370,000;

4,700

13 meters

33 meters

53 meters

73 meters