Which of these gives rise to nervous tissue? 

The eye and ocular adnexa make vision possible by receiving light and converting it into impulses that are transmitted to the:

a. cornea. b. optic nerve. c. lens. d. choroids plexus.

The recommended vertical angulation for exposing a mandibular canine periapical radiograph using the bisecting technique is

A) -10 degrees. B) -15 degrees. C) -20 degrees. D) -5 degrees.