OBJECTIVE FORESTRY

Detailed explanation-1: -Animals without backbones are called invertebrates. They range from well known animals such as jellyfish, corals, slugs, snails, mussels, octopuses, crabs, shrimps, spiders, butterflies and beetles to much less well known animals such as flatworms, tapeworms, siphunculids, sea-mats and ticks.

Detailed explanation-2: -More than 90 percent of all living animal species are invertebrates. Some have soft bodies, like worms, slugs and jellyfish. Other invertebrates, like insects, spiders, snails and crustaceans, have a hard outer casing called an exoskeleton to protect their bodies.

Detailed explanation-3: -Invertebrates that you may be familiar with include spiders, worms, snails, lobsters, crabs and insects like butterflies.

Detailed explanation-4: -Snails, clams, oysters, and mussels are examples of mollusks. A mollusk has a soft body. Arthropods are animals with jointed legs such as spiders, insects, lobsters, and crabs.