#Question id: 2348
#Unit 2. Cellular Organization
The sodium-potassium pump functions to
#Question id: 10407
#Unit 6. System Physiology – Plant
#Question id: 5733
#Unit 8. Inheritance Biology
In individuals heterozygous for a chromosome inversion, the homologous chromosomes form a loop in prophase I of meiosis.
Which of the following is effect of inversion?
A. A dicentric and an acentric chromosome in meiosis I as the chiasmata gets terminated when inversion includes centromere
B. Appearance of deletion and duplication in both the cross over products chromosomes when centromere outside of inversion region
C. All recombinant gamete are non-viable gametes when single crossing over within inverted region; irrespective to paracentric or pericentic inversion
D. Nonviable gametes are usually produced, resulting in a depression in observed recombination frequencies.
Which of the above statements are correct?
#Question id: 8680
#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
By examining the phylogenetic tree diagrammed in the figure above, what conclusion can you draw about the species G. microti?
#Question id: 16962
#Unit 11. Evolution and Behavior