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545 million years ago

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Q: What time period did hard shell mollusks appear?
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What covers mollusks bodys?

Mollusks have soft body and hard shells but some don't even have shells.


Do mollusk have a hard outer shell?

no..... slugs are mollusks and they don't have a shell


Does mollusks protect themselves?

Most of Mollusks protect themselves with help of shell . Shell is hard protective covering made up of CaCO3. Cephalopods are not protected by shell .


What is the name of the hard shell of crabs and toitoises?

The hard shell of a lobster is known as the chitin.


What would a mollusks hard shell help it to do?

Protect against predators trying to eat it.


What characteristics do all mollusks share that separate this phylum from other phyla in the kingdom animalia?

All mollusks possess a soft body covered by a hard shell, a muscular foot for movement, and a mantle that secretes the shell. These characteristics distinguish mollusks from other phyla in the animal kingdom.


Is it true that mollusks with a hard outer shell are invertebrates?

Yes, they are invertebrates as they don't have a spine or an internal skeleton.


What order do mollusks belong to?

Mollusks are animals like snail squid clam cuttlefish lamp shell oyster, they are soft bodied and sometimes hard shelled animals.


3 examples of mulluscs?

Mollusc's have a hard outer shell . For example a mollusk would be a snail and there's even more .Here are examples of a mollusks snail , slugs , clams , oysters , squids and octopus . And also not all mollusks have an hard outer shell for example it would be a slug or a squid they both don't have a hard outer shell . This group is a part of the invertebrate theme.


What is a hard changing rainbow-colored lining of the shell of various mollusks like oysters?

It is called Mother of pearl.


What are mollusks with a hard outer shell?

The Answer would be invertebrate : ) ... !


Are octopopus's crustaceanswhy or why not?

An octopus is a mollusk. Mollusks have soft bodies. Some other examples of mollusks include snails and bivalves. A crustacean has a hard shell. Crabs and lobsters are crustaceans. Octopus like to eat crustaceans, but they are mollusks.ya