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What is the water shed and annual surface runoff for the following:
1. Calcasieu River
2. Atachafalya River
3. Mississippi River
4. Bogue Chitto
5. Pearl River
6. Pascagoula River
There were many extinction events since life began. Permian extinction is a very important event. Explain why was it so important?
If gametes from a gene pool combine randomly to make only a small number of zygotes, the allele frequencies among the zygotes may be different and discuss the founder effect
A cricket has a diploid genome of 1.2 billion base pairs. Assume that there are about 200,000 individuals in the population and that the mutation rate is one per 100 million base pairs. About how many new mutations will occur in each generation of..
If the control is solid and an inoculated tube is liquid, is it acceptable to read the results before the complete incubation time has elapsed? Why or why not.
Lysozyme was assayed at bacterial cell wall, = 2.5x10-8 g. The Km for the substrate = 6x10-3g. At the end of one minute 2.5% of the cell wall hydrolysed.
You find out an unusual organism growing in the bark of a dying tree. Under a microscope, you observe that its cells are eukaryotic, have cell walls, and do not contain chloroplasts. Into what kingdom would you categorize this organism? Explain the d..
Highly repetitive DNA is common in eukaryotic chromosomes, it does not code for proteins; in fact, it is probably never transcribed into RNA.
A corporation has invented a new low-calorie sugar substitute. They wish to determine if the substitute might be carcinogenic, so they use it in the Ames test with Salmonella his mutants.
Determine which do you think would have the most serious effect, and why: a 5 mEq/L increase in the plasma concentration of sodium, potassium, chloride, or calcium?
In a protein sequence, which repeated sequence over a twenty amino acid stretch would most likely lead to insertion of a transmembrane domain into a lipid bilayer.
Which one of the following statements is true.
Compute the molality of a solution prepared by dissolving 1.5 grams of dextrose in 1.0 liters of water.
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