Which of the following is (are) unique to animals?
A) cells that have mitochondria
B) the structural carbohydrate, chitin
C) nervous system signal conduction and muscular movement
D) heterotrophy
E) flagellated gametes

Question

Quizplus · Accepted Answer

While all of these traits are present in some form in various organisms, the ability to conduct signals through a nervous system and use muscular movement to respond to those signals is unique to animals. The other traits listed are also found in some non-animal organisms, such as plants having cells with mitochondria, fungi having chitin in their cell walls, and many organisms being heterotrophic. Flagellated gametes are also found in some non-animal organisms, such as some algae.

Which of the Following Is (Are) Unique to Animals