Which group of animals belong to the coral reef ecosystem? I. fishes, corals

II. mollusks,

III. jelly fishes, worms

IV. star fish, sea urchin

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

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

the answer is b.) hydrogen bonds between bases.