Which of the Following is (Are)unique to Animals

Question

Which of the following is (are)unique to animals?
A)cells that have mitochondria
B)the structural carbohydrate, chitin
C)nervous conduction and muscular movement
D)heterotrophy
E)Two of these responses are correct.

Accepted Answer

Nervous conduction and muscular movement are unique to animals and are not present in other kingdoms. Choice A is incorrect because cells with mitochondria are also present in plants and fungi. Choice B is incorrect because chitin is a structural carbohydrate found in the cell walls of fungi and the exoskeletons of arthropods. Choice D is incorrect because heterotrophy is also present in fungi and some protists.