GEOLOGY

Detailed explanation-1: -Invertebrates: The animals that do not possess backbones are known as vertebrates. These animals are mostly soft-bodied. For example Earthworms, snails, sponges, etc.

Detailed explanation-2: -Invertebrates do not have backbones or internal skeletons, but some have hard coverings. Insects, spiders, worms, snails, and most ocean animals are invertebrates.

Detailed explanation-3: -Invertebrates are those organisms that lack a spine or back bone. They evolved before vertebrates and are generally a simpler form of life having a simple notochord or simple nervous system. The support and structure that comes from the backbone come from other structures in invertebrates.

Detailed explanation-4: -Sponges (Porifera) Comb jellies (Ctenophora) Medusozoans and corals (Cnidaria) Acoels (Xenacoelomorpha) Flatworms (Platyhelminthes) Bristleworms, earthworms and leeches (Annelida) Insects, springtails, crustaceans, myriapods, chelicerates (Arthropoda) More items