What is the evidence for an association between climate change and human evolution? Is there a cause and effect relationship between the two processes?

How do you date a sample of rock that you suspect as being one of the earliest on earth

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system

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