Which of the following is/are part of the nitrogen cycle:
a. eutrophication
b. denitrification
c. saturation
d. all of the above

Rotenone is an insecticide that is toxic

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 .

After a group of researchers conducts a new experiment that has never been conducted before, what is the best way for other scientists to make sure that the data is real