When describing image formation for plane mirrors, what is an important rule to remember about light rays?
A. The angle is smaller in the medium that has the higher index of
refraction
B. The angle is smaller in the medium that has the lower index of
refraction
C. The angle when it leaves is larger than the angle when it hits
D. The angle when it leaves is the same as the angle when it hits

Well the angle of refraction of light depends on refractive index of medium. You can calculate angle of refraction if you know the value of refractive index of medium. Suppose n is value of refractive index, i is ngle of incidence, r is angle of refraction then: sin(r)=sin(i)/n

There are many varying characteristics and exceptions to each type of protist.

They have been previously categorized based on what they are not

Recent studies show that protists have not descended from one common ancestor.

Explanation:

its right i took test :)