Which of the following accurately describes nutrient limitation? a. if one essential nutrient within an ecosystem runs out, primary productivity will be limited. b. limiting nutrients are the nutrients whose supply is in excess. c. soil environments aren't affected by nutrient limitation. d. nitrogen is typically the limiting nutrient in freshwater environments.

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

When analyzing tree rings, what do scientists assume a thin ring indicates?

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