Rhizobia are bacteria that live on the roots of some plants, such as legumes like pea plants. rhizobia convert an element in the atmosphere into ammonia. identify and explain the type of relationship this represents. a) it is parasitism because the bacteria absorbs food from the pea plant. b) it is commensalism because the bacteria and pea plant don't harm each other. c) it is competition because the rhizobia and pea plant both need the limited amount of available nitrogen. d) it is mutualism because the bacteria receives carbon from the pea plant, while the plant uses the ammonia to make amino acids.

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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