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.
2 Living things All other animals are called invertebrates. Invertebrates do not have aninternal skeleton. Examples of invertebrates include sponges, jellyfish,corals, worms, shellfish, octopuses, starfish, spiders and insects.esson 13/20 More about classifying animals 1 Vertebrates In a modern system of classification, all animals can be divided into twogroups â vertebrates and invertebrates. Vertebrates are animals that havea skeleton inside their bodies. Biologists call this an internal skeleton.