Lactose a sugar found in milk products is broken down by enzymes. the making of these enzymes is controlled by a genetic system in e. coli. when there is no lactose present in the body, the repressor protein blocks rna polymerase from binding to the promoter, making impossible. question 4 options: transcription translation replication

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.