Forces of 10N and 15N are acting on a body in the same direction and same sense. State the magnitude of the resultant force.

in same direction the forces add up means the resultant force will be 10N+15N = 25N

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.