Occasionally when doing Serologic Testing to identify strains of Salmonella isolates, the test for different O Antigens is negative. What is the most likely explanation?
What will be an ideal response?
the K Antigens are masking the O Antigens
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Certain species of Bacteria have been identified to cause obesity
Indicate whether the statement is true or false.
Each branch point or node of a phylogenetic tree represents:
A. an environmental pressure for evolution. B. a mutational event that leads to two species. C. common ancestor to two connected branches. D. the beginning of a new domain. E. the point when life started on earth.
Microscopically, this fungus appears barrel shaped with thick walls, which best describes which type of conidia?
a. Macroconidia b. Chlamydoconidia c. Arthroconidia d. Blastoconidia
Suppose sugar is removed from an excretory system tubule and returned to the blood. This would be an example of
____.
a. reabsorption b. excretion c. filtration d. secretion e. diffusion