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.
Vitamin A palmitate (retinyl palmitate, all-trans-retinyl palmitate) is the form of vitamin A which is absolutely essential for normal vision, and a deficiency of this vitamin will lead to night blindness in the beginning. Most of the body's vitamin A is stored in the liver as retinyl palmitate.Synthetic vitamin A comes in two forms; palmitate and acetate. Vitamin A acetate is used in tablets, and. is what you would consume when buying straight vitamin A pills.Vitamin A palmitate is the version used in food products because it is much more stable and dispersible in moisture than the acetate is. Vitamin A palmitate is spray-dried and has good particle size for blending in food products.s what you would consume when buying straight vitamin A pills. Vitamin A palmitate is the version used in food products because it is much more stable and dispersible in moisture than the acetate is. Vitamin A palmitate is spray-dried and has good particle size for blending in food products.