NEET BIOLOGY

Detailed explanation-1: -These animals are part of a group of invertebrates called arthropods, meaning “jointed legs.” Some mollusks, such as snails and clams, have a hard shell that they can hide in when danger threatens. The largest mollusk in the world is the giant clam.

Detailed explanation-2: -Insects, spiders and shellfish are some of the invertebrates that have exoskeletons. The exoskeleton provides them with strength and support, as well as protecting the organs inside their bodies.

Detailed explanation-3: -Snails have a hard shell on their back which serves as the skeleton. The shell on the back of snails is the external skeleton or also called an exoskeleton. They provide a wide surface area for the attachment of muscles. These also take up the role of camouflage and protection from mechanical stress and predators.

Detailed explanation-4: -Such animals as clams, oysters, mussels, and snails have a type of exoskeleton called a shell. Shells are made of a substance called calcium carbonate. Animals with shells do not molt. As the animals grow, the shells grow, too, along the edges.

Detailed explanation-5: -Examples of animals with exoskeletons are grasshoppers, cockroaches, ants, bees, scorpions, cicadas, lobsters, shrimp, black widows, snails, and crabs.