yes
No, most of the little animals that live inside them are edible, but the shells are not.
stop answering and find out your-self.
they are edible and can be sold and they have PRETTY shells;]
yes
yes
When the shells are closed. If open, tap them and if they close then they are safe to eat. If they do not close then they are not edible.
Soybean shells are very edibile, if they're cooked very well.
yes they where
The muscle that holds the shells together.
Most are edible, and have a higher protein count than beef. their shells are used for decoration and can be crushed and used for many different things.
Clams tend to be filter feeders and pull water into their shells and then filter out any edible organisms they find there. Typically they eat plankton and bits of algae.