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A group is experimenting with selection in an insect species due to exposure to a newly developed insecticide, cpd AW143. The group has found that after 10 generations of exposure, the population is now bimodal in its response to the drug. Close to 30% of the population are completely normal while 70% live only about 1/6 of the normal lifetime. This is an example of __________.
Myopia
A common vision condition also known as nearsightedness, where distant objects appear blurry while close ones are seen clearly.
Presbyopia
A state related to older age where the eye gradually loses its capacity to concentrate on objects that are close.
Cataracts
An eye condition characterized by the clouding of the lens, leading to a decrease in vision which can develop slowly and affect one or both eyes.
Macular Degeneration
A progressive disease that usually affects people older than the age of 50. It occurs when the retina no longer receives an adequate blood supply.
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