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Three to 5 days after eating Thanksgiving dinner at a restaurant,112 people developed fever and gastroenteritis. All the foodhad been consumed except for five “doggie” bags. Bacterial analysis of the mixed contents of the bags (containingroast turkey, giblet gravy, and mashed potatoes) showed the samebacterium that was isolated from the patients. The gravy hadbeen prepared from giblets of 43 turkey that had been refrigeratedfor three days prior to preparation. The uncooked gibletswere ground in a blender and added to a thickened hot stockmixture. The gravy was not reboiled and was stored at roomtemperature throughout Thanksgiving Day. What was the sourceof illness? What was the most likely etiologic agent? Was this an infection or an intoxication?
What are e any 2 physical variables responsible for North Atlantic and north pacificgyres (keep in mind these gyres give rise to all of theimportant oceanic an along shore currents).
Who creates more ATP by substrate level phosphorylation.
Currently, three fossil skulls of Homo sapiens, dating to about 160,000 years BP, were discovered in eastern Africa. These skulls fill a gap between the 100,000 year old H. sapiens.
Define germline and soma (1). Explain the concept of separation of germline and soma (2). Explain how this concept changed our understanding of the evolutionary significance of the inheritance of acquired characteristics (2).
Why is it advantageous of an organism to be diploid? Why is it a disadvantage to a geneticist who might wish to study the organism? Why is it advantageous for a diploid organism to produce haploid gametes in order to reproduce itself?
find out the major pathway of glycine degradation. you find that the amino acid serine contains the most radioactivity, and that both the Calpha and Cbeta carbons of the serine residue are labeled with 13C. Explain these observations.
after a hormone enters the bloodstream ,it is transported through out the body ,but the hormone only affects certain cells
A lethal mutation occurs in a bacterium, rendering it incapable of replicating it's chromosome. Because of this mutation, DNA synthesis produces many short fragments of DNA that have RNA sequences at their 5' ends.
The time-of-entry mapping method was used to determine the first five markers transferred from each Hfr during a synchronized conjugation experiment. The markers and their transfer order form each Hfr are shown below.
Suppose that in Drosophila melanogaster an XXY female with white eyes (due to the w^1 allele on both copies of an attached X chromosome) is mated with a male that has a yellow body (due to the y allele on the X chromosome).
write a hypothesis describing the phenotype of the germinating tobacco seeds. include the approximate number of
With two nearby ponds in a forest as the study site, how would you design a controlled experiment to measure the effect of falling leaves on net primary production in a pond?
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