Which of the following describes a solution that contains a buffer? a. acetic acid is added to the solution, and the ph of the solution becomes lower. b. distilled water is added to the solution, and the ph of the solution does not change. c. formic acid is added to the solution, and the ph of the solution becomes higher. d. sodium hydroxide, a base, is added to the solution, but the ph of the solution does not change.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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