The presence of meat (undigested proteins) in the digestive tracts stimulates the secretion of gastrin into the: A) duodenum
B) liver
C) pancreas
D) blood

Adrought killed all the plants in an agricultural farmland. gradually, due to wind and some birds for. nearby areas, new plants started sprouting l. what stage of succession was taking place in the farmland? a) competition b) nudation c) ecesis d) reaction e) migration

Which of the following is a testable hypotheses?

Along what geographical feature are most of the oil producing regions located