Evolutionary adaptations that diverse animals directly exchange matter between cells and the environment include evolutionary adaptations that diverse animals directly exchange matter between cells and the environment include an external respiratory surface, a small body size, and a two-cell-layered body an unbranched internal surface, a small body size, and thick covering a gastrovascular activity, a two-layered body, and a torpedo-like body shape a large body volume, a long, tubular body, and a set of wings

The sketch shows a rynchosaur, an extinct animal that is known only from fossils. there has been much debate about the classification of these creatures. some scientists suggest that they belong with primitive amphibians, and some think they are related to snakes and lizards.the data equally support both cases. which statement best explains how to draw a cladogram that includes the rynchosaur? draw the cladogram for amphibians. draw the cladogram for reptiles. draw two cladograms, both showing the traits, and leave it as a hypothesis. draw two cladograms, both showing the traits, and have scientists vote

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

Select the word from the list that best fits the definition the temperature to which air must cool to be saturated