Some nocturnal animals, such as toads, mice, rats, and bats, have impressive night vision thanks to having many more ______________ (rods/cones) than ______________ (rods/cones) in their retinas....

Some nocturnal animals, such as toads, mice, rats, and bats, have impressive night
vision thanks to having many more ______________ (rods/cones) than ______________
(rods/cones) in their retinas. These creatures probably have very poor ______________
(color/black-and-white) vision.