Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. VWhales have lost their hind limbs. How can natural selection account for...

Extracted text: Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. VWhales have lost their hind limbs. How can natural selection account for these losses? The ancestors of these organisms experienced harmful mutations that forced them to lose these structures. Natural selection accounts for these losses by the principle of use and disuse. OIf the function of these structures has diminished over long periods of time, each of these structures presented greater costs than benefits. O Natural selection cannot account for losses, but accounts only for new structures and functions.