16) cells that elongate their cell walls prior to septation and septate in parallel planes will form choose one: a. tetrads of rods (bacilli).
 b. chains of rods (bacilli).
 c. tetrads of spheres (cocci). d. chains of spheres (cocci).
 18) the major organic component (by total weight) of a bacterial cell is 
 choose one: a. dna b. protein c. water d. rna 15)proteins that transport only one kind of molecule down (with) that molecule’s concentration gradient are involved in choose one: a. passive transport. b. active transport. c. facilitated diffusion. d. coupled transport. 5)which of the following is the most convincing evidence for the bacterial origin of mitochondria? choose one: a. mitochondria contain a circular chromosome. b. mitochondria are surrounded by a single membrane. c. mitochondria contain their own ribosomes. d. there is only one mitochondrion per eukaryotic cell.

16) B. chains of rods

18) C. water

15) C. facilitated diffusion

5) C. mitochondria contain their own ribosomes

bc blah

explanation:

bc blah

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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explanation: