For questions 16–19, write true if the statement is true. if the statement is false, replace
the underlined word or words to make the statement true. write your changes on the line. 16. most oil pollution in the oceans comes from small, nonpoint
sources. 17. marine organisms at higher trophic levels contain higher levels of
mercury. 18. of the nutrients phosphorus and nitrogen, phosphorous causes
the most damage to oceans. 19. reducing oil seepage into coastal waters can lessen the frequency
of algal blooms.

blah

explanation: bc blah

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

rain is the best answer