Which of the following is a characteristic of whales that makes them more efficient at swimming?

Hagfishes are mostly scavengers that feed on dead or dying animals.  They produce a chemical compound that can turn seawater into a thick slime.  This slime is used as a defense mechanism against predators.

The Steller’s Sea Cow is a sirenian that lives in the North Pacific.  The populations of this large marine mammal (some reach 30 feet and 8,000 pounds) are currently low and are considered endangered.

Which of the following is true about the fins of actinopterygians?

Sea turtles usually leave the water to

A patient recovering from DKA asks the nurse how acidosis occurs. The best response by the nurse is that

The marine iguana is a carnivorous animal that feeds on fishes.  It swims using its powerful arms.

Based on molecular evidence, the closest living relative of whales appears to be the hippopotamus.

Sexually dimorphic fishes are those in which the males and the females look different in their external anatomy.

Which of the following is true about mammals?