_____ is a threatening event that has a relatively long duration and no readily apparent time limit

You are walking late at night when you note movement

coming up behind you on your left side. You spin around and accidently scare the jogger. Your ability to detect this movement demonstrates your excellent peripheral vision, which is due to the area of the retina that is 20 degrees from center and has a large number of a. phosphenes. b. cones. c. rods. d. stereocilia.

What does it mean if a scale of measurement has a "true zero point"?

A) Scale is centered on zero as the true starting point. B) Value of zero on the scale represents the absence of what is being measured. C) You cannot use the scale for measurements of very small events. D) Value of zero on the scale represents an extremely low value of what is being measured.