A) Any aquatic invertebrate having a shell or shell-like carapace, esp such an animal used as human food. Examples are crustaceans such as crabs and lobsters and molluscs such as oysters.
B) Any of numerous chiefly marine invertebrates of the phylum Mollusca, typically having a soft unsegmented body, a mantle, and a protective calcareous shell and including the edible shellfish and the snails.
They are different because casts and molds are just an imprint (or a copy) of the organism's body. The soft parts of the organism would most likely decay, and the shell, bones, or just the outer hard parts would be fossilized.
No corals have a protective outer shell like a snail or clam, they actually have an inner skeleton, or endoskeleton. It is almost always composed of CaCO2, in English that's calcium carbonate. Snail and clam shells on the other hand are made of calcite or calcium carbonate mixed with calcium phosphate.
The largest shell in the Philippines is the Tridacna gigas, also known as the giant clam. It can grow up to 4 feet in length and is a protected species due to its status as an endangered marine organism.
Bugs are invertebrates, which means they do not have a spine. Instead, they have a hard outer shell called an exoskeleton.
The mantle in a clam is a thin layer of tissue that surrounds the body and lines the inside of the shell. It is located between the body and the shell of the clam and plays a role in secreting the calcium carbonate that forms the shell.
Snails do not have bones but they do have a hard outer shell, like a clam, known as an exoskeleton.
can cherrystone clams be eaten on the half-shell
I assume calm means clam? In which case, a clam does have a hard external (skeleton?) shell of calcium carbonate. The shell is known as an exoskeleton.
a hard shell and burying themselves in the sand
A clam shell
Possessive form of the words clam shell: clam shell's
Spiders do not have bones. They have exoskeletons which is a hard outer shell.
An egg with an outer hard shell is called the cuticle or bloom. It helps keep out bacteria and dust.
no..... slugs are mollusks and they don't have a shell
the crust
The outside layer of a clam shell is the periostricum. The middle layer is the prismatic layer. The inside layer is the nacreous layer.
chaitan