9) Western blotting is an immunological test used to identify the antibodies in the serum of an individual suspected of having Lyme disease.

8) Serological testing is used for screening bacterial isolates for similarities.

1) The cell membranes of all three domains are composed of straight carbon chains attached toglycerol by ester linkage.

2) Chloroplasts possess circular DNA and reproduce by binary fission.

4) The highest level in the current taxonomic hierarchy is "Kingdom."

10) When building a cladogram, the length of the horizontal branch is based on the calculated percent similarity between organisms.

5) Pure cultures of the same species are not always identical in all ways.

6) At this point in time, scientists believe the vast majority of the domain Bacteria have been discovered.