a. Drawings to show the pond snail in various positions in the aquarium.
b herunterladen. A drawing of the slug.
c. At least three different types of snail shell.
1. In what respects does a snail show resemblance to a clam herunterladen?
2. What are the chief points of difference?
3. What reasons can you suggest for the better development of the sense organs?
4 microsoft office kostenlos downloaden vollversion deutsch chip. What advantage has a snail over a clam in the matter of getting food?
5. How does the shell of the snail compare with that of the clam as an organ for protection?