#Question id: 11152
#Unit 9. Diversity of Life Forms
When sufficient heat is applied, double-stranded DNA denatures into two single-stranded molecules as the heat breaks all of the hydrogen bonds. In an experiment, molecules of single-stranded DNA from species X are separately hybridized with putatively homologous single-stranded DNA molecules from five species (A-E). The hybridized DNAs are then heated, and the temperature at which complete denaturation occurs is recorded. Based on the data below, which species is probably most closely related to species X?
#Question id: 11153
#Unit 9. Diversity of Life Forms
A researcher wants to determine the genetic relatedness of several breeds of dog (Canis familiaris). The researcher should compare homologous sequences of __________ that are known to be __________.
#Question id: 11154
#Unit 9. Diversity of Life Forms
Concerning growth in genome size over evolutionary time, which of these does not belong with the others?
#Question id: 11155
#Unit 9. Diversity of Life Forms
Nucleic acid sequences that undergo few changes over the course of evolutionary time are said to be conserved. Conserved sequences of nucleic acids
#Question id: 11156
#Unit 9. Diversity of Life Forms
Species that are not closely related and that do not share many anatomical similarities can still be placed together on the same phylogenetic tree by comparing their
#Question id: 11157
#Unit 9. Diversity of Life Forms
Typically, mutations that modify the active site of an enzyme are more likely to be harmful than mutations that affect other parts of the enzyme. A hypothetical enzyme consists of four domains (A—D), and the amino acid sequences of these four domains have been determined in five related species. Given the proportion of amino acid homologies among the five species at each of the four domains, which domain probably contains the active site?
