Which one of the following accurately describes the lac operon? a. rna polymerase is prevented from transcribing the lac genes when lactose is present. b. rna polymerase transcribes the lac genes when lactose isn't present. c. the repressor protein binds to the operator when lactose is present. d. the repressor is freed from the operator when lactose is present.

Can you identify which of the following groups of organisms are, or are not, populations? a. the american bison (bison bison) and grey wolves (canis lupus) currently living in yellowstone national parkb. all of the rainbow trout (oncorhynchus mykiss that) that have ever lived in lake eriec. the group of american bison (bison bison) currently living in yellowstone national parkd. a group of calliope hummingbirds (selasphorus calliope) and a group of rufous hummingbirds (selasphorus rufus) living in the same new hampshire woodse. the northern cardinals (cardinalis cardinalis) living on opposite shores of lake champlain f. all of the whales currently living in the atlantic ocean off cape cod, massachusetts

In one or two well-crafted paragraphs in your laboratory journal, summarize the process in which normal cells become cancer cells. your paragraph(s) must include each of the terms listed below. underline each term in your writing:

An original dna strand has the following base sequence taggtaact what base sequence would be produced through dna replication