A phylogenetic tree shows the hypothesized evolutionary relationships among organisms, meaning that its structure can be revised and changed as new information about those relationships becomes known.
Answer the following statement true (T) or false (F)
True
Phylogenetic trees can be continuously updated as new data is analyzed and systematists learn more about the evolutionary relationships among organisms.
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Researchers would like to create HIV protease inhibitors that will not become ineffective due to viral strain resistance. One approach is to design a:
A. protease with no aspartate residues. B. protease inhibitor and treat all patients in a community simultaneously. C protease inhibitor that will not be mutated in the aspartate region. D. protease inhibitor that binds to highly conserved protease sequences. E. random screening program that tests hundreds of drug candidates.
Refer to the figure below for the following question(s)
©2014 Brooks/Cole, Cengage Learning Using the information in the following table, fill in the cladogram with the appropriate groups (A-J) and the distinguishing characteristics (K-S). ©2014 Brooks/Cole, Cengage Learning A. B. C. D. E. F. G. H.
I. J. K. L. M. N. O. P. Q. R. S.
What will be an ideal response?Marsupials are thought to be most closely related to:
a. placental mammals. b. monotremes. c. reptiles. d. birds. e. amphibians.
The sequencing of the human genome lead to the realization that chromosome 19 contains many genes while chromosomes 13 and Y contain relatively few. This finding implies what about the density of genes in a genome?
A) Genes are not uniformly distributed and appear in clusters separated by large noncoding regions. B) Genes are uniformly distributed throughout the genome. C) Genes are uniformly distributed on chromosomes but not through the entire genome. D) Genes have no organization and randomly appear throughout the genome and chromosomes.