The correct answer is D :)
Metabolic pathways stimulate cell division.
A. Extinction is a natural part of life on earth
The main difference between the organisms are the uses of the appendage and the size and number of certain bones. The human arm is used for a variety of functions while the lizard's and the cat's are used for walking an climbing, the whale's for swimming, the frog's for support and the bird's and the bat's for flying.
Answer:
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