It essential that the human body maintain adequate levels of calcium at all times. A drop In levels stimulates the parathyroid gland to release regulatory hormonesOn the other hand, excess calclurn in the body signals the thyrold gland to fix the calcium the bones, thereby reducing the amount of calcium the blood. What does this process best exemplify?

How are gene and protein sequences used to classify organisms?

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

Astudent sees several ants walking up a wall following the exact same trail that an ant took earlier. she wants to apply the scientific method to determine how the ants detected the trail. which of these steps would come first in her application of the scientific method? perform an experiment by cleaning the scent away from part of the trail. draw a conclusion that the ants follow a scent trail. make a prediction about what the ants will do after she cleans away part of the trail. hypothesize that the ants are following a scent trail that the first ant left.