Choose all the answers that apply. Vaccination .

was developed by Wilhelm Röentgen
provides a type of adaptive immunity
injects a weakened or inactive form of a virus into the body
is 100 percent effective in disease prevention
must be given on a regular basis from birth to 18 years of age

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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.