NEET BIOLOGY

Detailed explanation-1: -In contrast, invertebrates are animals that do not have backbones. Invertebrates can have a skeleton outside their bodies called an exoskeleton, while some invertebrates have no skeleton at all! In fact, the majority of animals on Earth are invertebrates.

Detailed explanation-2: -More About Exoskeletons Most animals with exoskeletons are invertebrates, which means animals that do not have backbones. Insects make up the largest group of animals to have exoskeletons. However, many other animals have exoskeletons as well, including crabs, lobsters, shrimp, snails, and spiders.

Detailed explanation-3: -While the majority of invertebrates have a non-cartilaginous exoskeleton, a select few invertebrates have endoskeletons, including squid and octopus, as well as echinoderms such as starfish and sea urchins.

Detailed explanation-4: -Spiders, crustaceans (crabs, lobsters, and shrimps), and insects have exoskeletons made up of sections with jointed legs. 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.

Detailed explanation-5: -An invertebrate is an animal without a backbone. In fact, invertebrates don’t have any any bones at all! Invertebrates that you may be familiar with include spiders, worms, snails, lobsters, crabs and insects like butterflies.