Which of the following must happen for a transcript of the lac operon genes to take place?
a. the repressor proteins bind to the dna molecules, and rna polymerase falls off.
b. lactose removes from the system.
c. the repressor proteins bind to the promoter sequences.
d. the repressor proteins falls off the dna molecules, and rna polymerase binds to.

2. how does the miller-urey experiment fall short of demonstrating that life can arise from inorganic molecules? explain. a. it doesn't show a leap between a collection of amino acids and a single-celled organism. b. it recreates the conditions that existed at the earth's beginning, but no molecules form as a result. c. it doesn't provide evidence of the formation of amino acids. d. it doesn't show how multicellular organisms developed from unicellular organisms

How is the carbon cycle related to global warming ?

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above