Question

Dolphins are animals that live in water, but they do not have gills. What might this suggest about dolphins?(1 point) Responses They do not need oxygen. They do not need oxygen. They have another structure to obtain oxygen. They have another structure to obtain oxygen. They make their own food. They make their own food. They do not need to release carbon dioxide.

Answer 1

The correct response would be: **They have another structure to obtain oxygen.**

Since dolphins do not have gills, they have lungs and surface breathe air, which allows them to obtain the oxygen they need from the atmosphere.