There are important differences in the structure and chemical makeup of their cells.
Some prokaryotes are unicellular, and others are multicellular. Although bacteria and archaea are similar in some ways, there are important differences in the structure and chemical makeup of their cells.
Metagenomics is the study of genetic material recovered directly from environmental sample. Its field has been responsible for substantial advances in microbial ecology, evolution, and diversity over the past 5 to 10 years and many research laboratories are actively engaged in it now. Using metagenomics, the distinctions between bacterial species are based upon the comparison of DNA nucleotide sequences of different bacterial species.
“Gaps in the fossil record disprove evolution.” Response: The fact that some transitional fossils are not preserved does not disprove evolution. Evolutionary biologists do not expect that all transitional forms will be found and realize that many species leave no fossils at all.
B. A sunflower in a sunny meadow
