If deletion of a control element causes an increase in gene expression, what must be the normal role of that control element

answer; polycythemia is the correct answer;

earthquakes in florida are rare because the state is not located near any tectonic plates. in fact, florida is tied for first place as having the fewest earthquakes of any state. much of florida is limestone and seafloor materials that is not conducive to earthquakes.

explanation:

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.