How long does it take water to move through the water cycle?

What is the process of pulling apart an n2 molecule nevermind i got it

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone

Which of the following describes the difference in stimuli required to detect a difference between the stimuli? a. just noticeableb. signal detectionc. subliminald. top down