The graph shows three different projections of human population growth which two colored lines on the graph show the human population reaching carrying capacity

Which element provides strength to the exoskeleton of clams and oysters

Environmental differences within ecosystems are generally caused by

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