Multicellular life evolved on Earth about a billion years ago. For example, people are Homo sapiens. Dinosaurs are the only animals that are commonly known by their scientific name, e.g., Tyrannosaurus rex . A biomass is the total amount of living material in an area. It is calculated by adding up the weights of all of the individuals.
People are bipeds, so are birds.
BIRD Birds have feathers and wings. Many birds eat butterflies and moths. They may be the descendants of theropod dinosaurs. These enormous butterflies usually live high in the tops of trees in rain forests. Adults sip flower nectar.