The water cycle, like the other cycles, is a “closed system.” what does that say about the importance of keeping the water on earth free from population

Like you stated, the water cycle is a closed sytem.Therefore, it's never ending it will keep on going, and repating it's self forever.So we need to keep it clean because, we use water for food, dishes, etc which is a pro.The con of trying to keep water is fresh is the fact we bathe, and clean with water. Even though we bathe, and stuff with water we can try to keep water clean.Even though water goes through a process and people say the water system cleans water doesn't mean it's true.The best ting we can do to keep free from population is use less water, and try keeping large, small bodies of water clean.

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

hi, natural selection of the peppered moth during the industrial revolution in 19th-century england is an example of an outlier in the study of evolution. during this time, pollution from factories filled the forests, coating trees in a layer of soot—turning white trees black

mark as brainlest

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