Evolutionary biologists often use the 16S rRNA gene sequences of prokaryotes to determine genealogical relationships between them. Because these sequences are highly conserved, differences between them are notable and useful for this kind of analysis. While sequencing bacterial endosymbionts from various plants in 1992, results showed that some of these bacteria displayed a lot of similarity in their rRNA sequences, others less, and others very little similarity. The scientists determined that the most likely explanation was that those with the most similarity shared a more recent common ancestor than those with less similarity. Which principle did the scientists use to arrive at this conclusion?
a. conductive reasoning
b. natural selection
c. maximum parsimony
d. proteomics
c. maximum parsimony
You might also like to view...
The kneecap is the
a. tibia. b. patella. c. scapula. d. clavicle. e. tarsal.
Characterize the types of symbioses involved in the ant-wasp-aphid-buchnera-secondary symbiont system. Which pairs of species interactions do you think represent symbioses? Which pairs of interactions do you think are too weak or distant to be considered symbioses?
What will be an ideal response?
Which will exhibit the most shared maternal effects (uterine environment, etc.), identical or fraternal twins?
What will be an ideal response?
Which of the following name two mutagens that would be classified as base analogs?
A) ultraviolet light and cosmic radiation B) 5-bromouracil and 2-amino purine C) acridine orange and proflavin D) hydroxyurea and peroxidase E) ethylmethane sulfonate and ethylmethylketone peroxide