Phosphatidylcholine and sphingomyelin both contain two long hydrocarbon chains, a phosphate, and the alcohol choline as a polar group. which of the following methods could you use to distinguish between these two phospholipids? □ hydrolysis with mild base separation by chromatography on silica gel acid hydrolysis followed by reaction with cupric (cu ) ion acid hydrolysis followed by reaction with sanger reagent (1-fluoro-2,4-dinitrobenzene)

Rachel ate a piece of fruit and happened to drop the seeds in her backyard. after a few weeks, she saw a small plant with flowers growing in the backyard. which group does this plant belong to? a. angiosperms b. gymnosperms c. pteridophytes d. bryophytes e. chytrids

Which event would lead to primary succession of a forest?

What evidence could be used to convince policy makers to change a shipping lane from going through a whale breeding ground? information on the number of all whale species currently alive information on the number of all whales hit by boats in the given area information on the number of whale deaths in the world's oceans information on the number of whale offspring born every year. (a) scientists could collect and combine data on fish populations all around the world to show that their populations are declining. (b) scientists collect and combine data on fish populations all around the world to show that their populations are increasing. (c) scientists work together and use past data to show that fish populations are becoming locally extinct in some areas. (d) scientists work together and use past data to show that some fish populations are adapting to environmental changes.