Corrective mechanism turned on.

condition deviates

condition returns to normal

corrective mechanism
turned off

'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.

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?

Why do mountaineers become breathless as they reach high altitudes