Which of the following is unique to animals?

Question

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Nervous conduction and muscular movement are unique to animals and allow for complex movement and behavior not seen in other organisms. A) Cells that have mitochondria are found in all eukaryotic organisms, including plants and fungi. B) Chitin is found in the cell walls of fungi and the exoskeleton of insects and crustaceans. D) Heterotrophy is the ability to obtain nutrients from other organisms, and is seen in both animals and some fungi. E) Flagellated gametes are found in some protists, including some algae and protozoans.

Which of the Following Is Unique to Animals