Describe why sickle cell disease is considered to be a recessive genetic disorder.

Which of these statements  mostaccurately characterizes linear perspective?   a. having learned that distant objects tend to be closer together, we interpret a two-dimensional image on the retina in three dimensions. b. we learn to compensate for the monocular disparity between the retinal images of the left and right eye. c. through experience, we determine that changes in images focused on the retina occur as a result of the motion of our bodies. d. as we view a landscape, the relative sizes of objects are revealed by texture gradient cues.