What is earth's crust?

a layer of radioactivity on earth's surface

a middle layer of earth that moves

the liquid rock in earth’s interior

the outermost layer on earth’s surface

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

Select the correct answer from each drop-down menu. the lac operon in e.coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .

Dna replication occurs in preparation for