Exercises on Lesson IX.
1. What are tadpoles? 2. How old is the frog before his hind legs appear? 3. A tadpole seems to be all head and tail. Can you explain this? 4. How do tadpoles breathe—(1) when they are first hatched? (2) when they are four weeks old? (3) when they are eleven weeks old?
Frog, Toad, and Newt—showing Eggs of Toad and Newt, and Tadpoles of Frog and Toad