Adaptation. An adaptation is a feature that is common in a population because it provides some improved function. Adaptations are well fitted to their function and are produced by natural selection. vestigial structure is a feature that was an adaptation for the organism's ancestor, but that evolved to be non-functional because the organism's environment changed. Fish species that live in completely dark caves have vestigial, non-functional eyes.
1 A nurse administering Botox in a mall on average costs $9-$12 per unit, or $200-$300 per area (with 20-30 units), which can run $200-$600 for a typical treatment. Treatments may be every 3 months. 2  A nurse administering Botox in a mall on average costs $9-$12 per unit, or $200-$300 per area (with 20-30 units), which can run $200-$600 for a typical treatment.
The average cost for botox is $13 per unit. This average is based on over 1400 prices collected by OkCopay from dermatologists and aestheticians across the United States. Use our interactive map below, to see how the costs for botox for cosmetic use varies widely across the country. The lowest average cost for botox can be found in Baltimore, Denver, Louisville, and Las Vegas, at $10 per unit. New York City has the highest prices, where on average the procedure costs $18 per unit. To use the map hover over a city with your mouse to see the cost range and average (median) prices. 1  Breast Augmentation. 2  In Vitro Fertilization. 3  Lasik. 4  Liposuction. 5  Rhinoplasty. 6  Teeth Whitening.