1. which of the following traits is not characteristic of animals?
multicellular body structure
composed of cells with cell walls
heterotrophic food-getting pattern
composed of eukaryotic cells
2. which of the following describes the most important difference between invertebrates and vertebrates?
vertebrates contain multiple tissues, while invertebrates do not.
invertebrates contain multiple tissues, while vertebrates do not.
vertebrates contain a backbone, while invertebrates do not.
invertebrates contain a backbone, while vertebrates do not.