Human impact on the environment or anthropogenic impact on the environment includes impacts on biophysical environments, biodiversity, and other resources. The term anthropogenic designates an effect or object resulting from human activity.
Animals can be divided broadly into vertebrates and invertebrates. Vertebrates have a backbone or spine (vertebral column), and amount to less than five percent of all described animal species. They include fish, amphibians, reptiles, birds and mammals. The remaining animals are the invertebrates, which lack a backbone. These include molluscs (clams, oysters, octopuses, squid, snails); arthropods (millipedes, centipedes, insects, spiders, scorpions, crabs, lobsters, shrimp); annelids (earthworms, leeches), cnidarians (jellyfish, sea anemones, corals), and sponges.
Most vertebrates have a spinal column made of bones called vertebrae (see SPINE). But some, such as the shark, do not have a bony spinal column. Sharks have vertebrae made of cartilage. Vertebrates are classified in the phylum chordata and make up the subphylum vertebrata.hose bones are called vertebrae so the animals are vertebrates. The animals that do not have backbones are called invertebrates. Some examples of vertebrates include human beings, cats, dogs, fish, elephants, and chickens.