This lizard produces its young by a process called parthenogenesis. These species have no males and proudly so because this does not hinder them from having families. Fake Sex In Female-Only SpeciesĮver heard of females getting children without the help of males? The virgin whiptail lizards are a rare example of this feat. Here are 10 examples of vestigial structures in animals. The more harmful the vestigial structures, the faster it takes to phase them out. Over time, they may be phased out through selective pressure. They can also cause disease and be a maintenance burden. Vestigial structures are usually harmless though they may bring some additional weight. Today we can still observe some of these. They remained part of the modern organisms. They are thought to have been necessary in the past during evolution in our more primitive ancestors.Īfter new life forms had evolved from their ancestors, some of these older structures were not discarded. These vestigial structures appear to have no use today.

Scientists think they have found a handful of these in modern organisms. BD Chaurasia Human Anatomy PDF (All volume)

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