NEET BIOLOGY

Detailed explanation-1: -More than 90 percent of all living animal species are invertebrates. Worldwide in distribution, they include animals as diverse as sea stars, sea urchins, earthworms, sponges, jellyfish, lobsters, crabs, insects, spiders, snails, clams, and squid.

Detailed explanation-2: -Only five percent of all known living animal species are vertebrates or animals with backbones (Fig. 3.3). The vast majority of animal species (95 percent) are invertebrates. Among all animal species, one particular group easily claims the highest number of species: the insects.

Detailed explanation-3: -Invertebrates make up more than 95% of all animal species worldwide. They can survive in different environments depending on how they live and reproduce. Every environment on earth, from the oceans and rainforests to the deserts and polar regions, has invertebrates.

Detailed explanation-4: -More than 90 per cent of living organisms are invertebrates, which are more varied in form than animals with backbones (vertebrates). Some terrestrial invertebrate forms include insects, spiders, crustaceans, round worms, molluscs, segmented worms, and flat worms.

Detailed explanation-5: -Invertebrates make up over 95 percent of the Earth’s animal species.