- Animal cells differentiate and carry out different functions
- Animals have specialized cells.
What are the characteristics that all animals share?
- All animals are eukaryotes (contain membrane-bound organelles).
- All animals are heterotrophic.
- All animals are multi-cellular.
- Animals obtain food.
- Animals digest food.
What are invertebrates? An invertebrate is an animal that does not have a backbone.
- Many invertebrates have exoskeletons (a hard covering on the outside of the body that provides support) include crabs, spiders, grasshoppers, dragonflies and beetles.
- Invertebrates such as sea urchins and sea stars have an endoskeleton (internal skeleton). What are vertebrates? A vertebrate is an animal with an endoskeleton and backbone. Examples: fishes, amphibians, reptiles, birds and mammals.
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