During bacterial conjugation, you wish to examine genes associated with the F plasmid of your bacterial strain of interest, as you feel that it possesses an additional gene. You are able to easily determine the presence or absence of the gene you believe to be associated with the plasmid. In order to investigate this possibility, you must allow conjugation between your strain and a compatible
strain that is
A) an Hfr strain.
B) another F+ strain.
C) an F' strain.
D) an F- strain.
E) the same F+ strain.
D) an F- strain.
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Blastospores are produced by glomeromycetes
____________________ Indicate whether the statement is true or false.
Soil dwelling spore-producing hyphae that transform into pathogenic yeasts when their spores are inhaled by mammals are called
a. rusts b. smuts c. mycorrhizal fungi d. dimorphic fungi e. dikaryotic fungi
Which of the following statements regarding tuberculosis is FALSE?
A) Nearly 1/3 of the world's population is infected with tuberculosis. B) Nearly 1/3 of the world's population shows symptoms of tuberculosis. C) It is responsible for nearly 2 million deaths per year. D) At least 1/3 of those who are TB-positive are also HIV-positive. E) Treatment requires at least six months of antibiotic therapy.
Which of the following would be the best approach to allow a biologist studying the evolution of four similar species of birds to choose the correct phylogenetic tree from all possible phylogenetic hypotheses?
a. Constructing the tree that connects the species using the fewest number of branches b. Comparing the entire genomes of the species and arranging species within the phylogeny based on genome similarity c. Determining which species can interbreed and concluding that those that can evolved from a common ancestor most recently d. Choosing the tree that has the most evolutionary changes, as this would be the most likely scenario to produce four distinct species e. Constructing phylogenetic trees consistent with DNA sequence comparisons among the species and then choosing the tree that involves the fewest number of evolutionary changes from a common ancestor to the current species