The snakes include some rather short and some incredibly long species,with a variation from about 100 to over 300 vertebrae.What developmental mechanism is the best candidate for changing the number of vertebrae in evolution?
A)Changes in genes that lay down extracellular matrix in bone
B)Changes in genes necessary for neural crest development
C)Changes in genes that control mitosis
D)Changes in the somitogenesis clock

Question

Quizplus · Accepted Answer

The somitogenesis clock is responsible for the segmentation of vertebrate embryos, which leads to the formation of vertebrae. Changes in this clock could result in changes in the number of vertebrae in evolution.

The Snakes Include Some Rather Short and Some Incredibly Long