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A streak plate is done to "dilute" microbes and isolate them from each other. During this procedure, what should you do between quadrants to decrease the number of bacteria you're working with?
Why will we be testing the same potential germicides against two different kinds of bacteria? Do you expect to see any differences in the results between the two? Explain.
why are they air-dried instead of being wiped dry with sterile filter paper? Your answer should include how rolling the beads might affect the final results
The plates are supposed to be used within a specific time after their preparation and should be free of visible moisture. Why do you think this so?
You are growing Bacillus subtilis in nine 16,000-liter fermenters to produce enzymes for industrial use. The Bacillus cultures had been growing for 2 days when the cells in one of the fermenters ly
Describe the physiological characteristics that differentiate the eleven major phyla present in the Domain Bacteria and discuss the importance to humans or the environment of representative member g
How can viruses lead to cancer? Be sure to use specific examples (e.g. virus name and the cancer it causes) to illustrate your points.
What are the distinguishing characteristics of lichens with regard to their nutritional needs, and what are the roles of the fungus and the alga that make up lichens?
To test ideas of surface-to-volume ratios, the student makes a quarter pound hamburger and a quarter pound meatball and cooks them at the same temperature. Which food item will cook the fastest and
What are the haploid reproductive structures of Fungi called and what is the name for the type of plants that use flowers as their reproductive structure?
Describe the societal benefits of wastewater and sewage treatment? Why might things like fish kills happen in streams contaminated with raw sewage? Would this waste have high BOD or low BOD? What i
The Verhulst's logistic model has been applied to the natural growth of the halibut population in certain areas of the Pacific Ocean. Let NN, measured in kg, be the total mass
Describe an example food web consisting of at least 1 of each of the following species - a producer, primary consumer, secondary consumer and tertiary consumer.
Is there evidence of a QTL linked to this marker in the father and Is there evidence of a QTL linked to this marker in the mother?
Describe the relationships among the following physical factors: pressure, physiography, ocean currents, latitude, temperature, light, precipitation, and wind and describe and discuss the parameters
Natural selection favors copper tolerance in all soils near the old mine, not only in the contaminated soils and the population that existed before mining included both copper-tolerant and copper-into
To prevent a lethal epidemic in the United states all those living in the U.S. must receive the vaccine and One can protect the entire U.S. population against an epidemic without having to vaccinate e
Your friend works for a biotech company, where they have come up with a top- secret drug they hope will cure a hereditary kidney disease.
Consider three loci linked in the following order: A-B-C, where the A-B recombination frequency is 0.1 and the B-C recombination frequency 0.05.
In 3-5 paragraphs reflect on the ethics of the government regulating stem cell research and answer these questions. Do you think the government should limit scientific inquiry and research using ste
What type of inheritance is operating here? If you crossed two cream guinea pigs, what is the probability of yellow offspring? Of white offspring? Of cream offspring?
What are the advantages and disadvantages of the different types of light and electron microscopes discussed in Chapter 3 that are used to study microorganisms?
In your discussion post, describe two instances of increased disease and the underlying causes. Explain how you think the medical and scientific community should respond.
Capnocytophaga kills only people who lack a spleen. What is the relationship between infection and the spleen?
What is the most likely mode of transmission of this bacterium in hospitals? How can transmission be prevented?