What is the most commonly voiced concern with distance education classes?

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

yes, because even though a theory has a  lot of evidence to support it, it is not always true