Which of the following organ systems perform interrelated functions within the human body? I. excretory and digestive
II. circulatory and respiratory
III. muscular and nervous
IV. skeletal and muscular

A. IV only
B. I, II, and IV only
C. I, II, III, and IV
D. II and IV only

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent

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

All organisms contribute some water to the water cycle by conducting