When air masses collide, changing weather patterns often occur at the boundaries between air masses. Meteorologists refer to this as a .

An example of a trait that would be considered acquired and inherited is a. a cleft chin b. muscle tone c. scar tissue d. freckled skin

What is the inability of an individual or a society to achieve a minimum standard of living known as ?

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