What environmental change is most likely to increase the stability of an ecosystem? Please help me

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

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.