1. When you give birth to live young.
1 of 13
Other questions in this quiz
2. What class is this describing...poikilotherms that have gills to take in oxygen from water
3. When your body temperature depends on the temperature in your environment - (i.e. cold blooded)
4. What class is this describing...poikilotherms that have gills when young but adults have lungs and can absorb oxygen through their skin.
5. What class is this describing...hometherms that lay eggs.