The shell of an oyster is mostly made of calcium carbonate.
A protective shell is a covering that provides defense or security. In nature, it refers to the hard outer layer that certain animals like turtles and snails have for protection. In technology, a protective shell could be a case or enclosure designed to shield a device from damage.
Dock
Test is a the hard outer protective layer of the seeds. It protects the seed from adverse environmental conditions
An exoskeleton is a hard outer shell or protective covering found on the outside of certain animals, such as insects and crustaceans. It provides support and protection for the animal's body and organs.
They are certainly better than nothing - but they aren't remotely as protective as a hard case. I own six guitars, and consider the hard cases the best investments I ever made in the instruments.
Ground oyster shells will make soft water harder. Therefore, it will make hard water, harder.
with it's hard shell with it's hard shell
You can use the word "oyster" to refer to a type of shellfish commonly found in coastal waters. It can also be used to describe the color, shape, or size of something that resembles an oyster shell. Additionally, it can be used metaphorically to refer to something that is hidden or hard to access.
Seashells, themselves, does not reproduce, only the animal that lives in them do. Seashells are hard, protective outer layer that a creature will use as a living space.
wasps don't really have skin. they have exoskeletons. an exoskeleton is a hard outer protective covering. as all insects are invertebrates they all have exoskeletons.
Seashells, themselves, does not reproduce, only the animal that lives in them do. Seashells are hard, protective outer layer that a creature will use as a living space.
Most nuts have a hard outer case to protect them from nut-loving creatures, giving them time to germinate and grow into more nut trees.