The magnitude of the vectors F is 21 N, the force on the right is applied at an angle 59° and the mass of the block is 37kg. If the surface is frictionless, what is the magnitude of the resulting acceleration?

answer: the correct answer for the fill in the blank is rods.

rods are the specialized photoreceptor cells that are present in the retina of human eye. they are responsible for vision in the night time ( also called scotopic vision). they have very low visual acuity and color distinguishing ability.

as they are responsible for vision in night time, therefore they are found predominantly in the nocturnal animals.