18. which one of the following is the highest level environmental organization?
a) ecosystem

c) biosphere
b) community

d) organism

This class has taught you that the use of science and medicine in practical ways has become an international endeavor. one of the greatest examples of an international science accomplishment is which allows the profiling of human dna, useful not only to science but also medicine. a) forensic science b) the fbi c) the human genome project d) bioterrorism

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

Can yall plz me on this question im having a hard time think about it