#Question id: 29528
#Unit 6. System Physiology – Plant
JA initiates biosynthesis of defense proteins as
#Question id: 29050
#Unit 10. Ecological Principles
Which of the following cells can withstand temperatures down to–38°C?
#Question id: 28589
#Unit 2. Cellular Organization
which of the following Cyclin–CDKs of G1 phase specifically belongs to budding yeast?
#Question id: 2173
#Unit 2. Cellular Organization
Which of the four classes of ATP-powered pumps share overall similarity: several subunits, the same general organization, and a similar function as H+ transporters?
#Question id: 8682
#Unit 9. Diversity of Life Forms
Giardia intestinalis can cause disease in several different mammalian species, including humans. Giardia organisms (G. intestinalis) that infect humans are similar morphologically to those that infect other mammals, thus they have been considered a single species. However, G. intestinalis has been divided into different subgroups based on their host and a few other characteristics. In 1999, a DNA sequence comparison study tested the hypothesis that these subgroups actually constitute different species. The following phylogenetic tree was constructed from the sequence comparison of rRNA from several subgroups of G. intestinalis and a few other morphologically distinct species of Giardia. The researchers concluded that the subgroups of Giardia are sufficiently different from one another genetically that they could be considered different species
Which of the following changes would a modern systematist be most likely to make after learning of the results of the rRNA analyses?