The pentose phosphate pathway is an alternative metabolic pathway for degradation of glucose which generates a nucleotide synthesis precursor. In the first portion of this pathway, glucose-6-phosphate is converted to the following enolate intermediate in a series of steps. This intermediate can then decarboxylate to form ribulose-5-phosphate, the nucleotide precursor. Draw a curved arrow mechanism showing this decarboxylation.

How does the fossil record provide evidence that the modern whale evolved from the anthracotheres? a) the modern whale looks like their ancestor the anthracotheres. b) the modern whale has all of the same structures as their ancestor. c) there is not enough evidence to suggest the the modern whale evolved from the anthracotheres. d) the anthracotheres has a structure that is still present in the modern whale, but is no longer of use to the modern whale.