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Q1. A population of 200 healthy fishermen was followed for development of Schistosomiasis. After being followed for 4 years 20 developed Schistosomiasis. 30 fishermen were followed for 6 years and they left for other jobs. The remaining who never developed Schistosomiasis was followed for 8 years.
a. compute the number of person years of observation accrued by the population.
b. determine the Incidence rate of Schistosomiasis amongst fishermen.
Q2. While a tall homozygous plant was crossed with a short homozygous plant, the F1 offspring were all tall. No short plants were present in the F1 generation. Which principle does this situation represent?
Why would the following statement be true or not true "a chemical disinfectant by definition should always be bactericidal."
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What type of interaction is directly responsible for the formation of secondary structure?
If you cross a black fur rabbit and a white fur rabbit, the resulting offspring look gray, when examining closely the fur of gray rabbit consist of both black and white hairs. What type of non-mendelian inheritance is this.
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The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic of all of these extracellular structures.
In some plants, a red pigment, cyanidin, is synthesized from a colorless precursor. The addition of a hydroxyl group (-OH) to the canidin molecule causes it to become purple. In a cross between two randomly selected purple plants, the following re..
What advantages would there be for an organism to be able to turn on or off particular genes in response to certain conditions?
Vinblastine is a pharmaceutical used to treat several cancers, such as lung and breast cancer and Hodgkin's lymphoma. It binds tubulin, a protein found in microtubules of the cytoskeleto.
Describe the advantage(s) organisms having aerobic metabolism have over those having only anaerobic metabolism.
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