The AP Biology exam has three main sections: molecules and cells, heredity and evolution, and organisms and populations. AP Biology is the most popular Advanced Placement course in the natural sciences. In 2016 over 238,000 students took the exam, and the mean score was 2.85. Most colleges and universities have a science and lab requirement, so a high score on the AP Biology exam will sometimes fulfill this requirement. The distribution of scores for the AP Biology exam is as follows (2016 data): 5 - 6.6%. 4 - 21.0%.
1. vitamin A2 - a viscous alcohol that is less active in mammals than is vitamin A1. dehydroretinol. antiophthalmic factor, axerophthol, vitamin A, A-any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes.. (Biochemistry) a vitamin that occurs in the tissues of freshwater fish and has a function similar to that of vitamin A. Formula: C20H28O.
1 An eye disease called age-related macular degeneration (AMD). 2  Some research shows that taking vitamin B12 with other vitamins, including folic acid and vitamin B6, might help prevent an eye disease called age-related macular degeneration. Injecting vitamin B12 as a shot, as well as taking through the nose or by mouth, is effective for treating low red blood cell counts caused by poor absorption of vitamin B12. 2  Vitamin B12 deficiency. 3  Taking vitamin B12 by mouth, through the nose, or as a shot is effective for treating vitamin B12 deficiency.