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1. Less economically developed countries will experience higher birth rates than more economic cally developed countries due to : A. Decreased availability of sanitary water.B. Higher infant mortality rate.C. Higher literacy rate of women D. Increased availability of contraceptives.2. A researcher collects high-resolution photographs of the Earth taken from outside space at annual intervals for the last decade. This data would be most useful to analyze which of the following: A. Human movement during crises.B. Migration patterns of large whales.C. Deforestation in the rain forest.D. Weather patterns during hurricanes.3. An individual suffers severe blunt trauma to the thoracic cavity. Which of the following organs are at greatest risk from injury:A. Heart and lungs.B. Liver and stomach.C. Brain and spinal cord.D. Large and small intestines. 4. A researcher is studying the rate of chemical reactions within living blood cells. When placing the cell into a petri dish with a PH of 2.5, the researcher should predict that the rate of the reactions will: A. increase immediatelyB. Decrease immediately.C. Remain the same. D. Increase immediately then decrease gradually.5. In developing countries, which of the following factors correlates with high birth rates?A. Increased availability of contraception.B. Increased education and standard of living.C. High infant mortality rate.D. High availability of postnasal care.
What do we mean when we say that the genetic code is degenerate? How does this explain why some mutations are silent and what's the difference between a sense and nonsense codon?
A solution of 0.10M acetic acid and 0.10 M sodium acetate has a pH of 4.76. Determine the pKa of acetic acid. What is the Ka for acetic acid?
q1. would you expect dissolved oxygen in water taken from the stream entering a lake to be higher or lower than
A protein has a molecular mass of 200 kDa as determined by gel filtration (=native molecular weight). When separated by SDS-PAGE (without a reducing agent present) only one polypeptide appeared with a mass corresponding to 100 kDa.
Among which of the following pairs of organisms is competitionlikely to be most intense?
An uncatalyzed reaction has a rate of 4.2 x 10-7 sec-1. When an enzyme is added the rate is 3.2 x 104 sec-1. Calculate the rate enhancement caused by the enzyme.
What would be the effect of a mutant receptor whose hormone-binding site was able to bind the hormone permanently? What would happen if this binding site were attached by genetic engineering to a receptor domain that was incapable of activating G ..
For a given reaction, G = -4 kcal/mole and the energy of activation for the uncatalyzed reaction = 5 kcal/mole. You add an enzyme, after which the activation energy decreased to 3 kcal/mole.
A one hundred ml vessel is filled with water separated in equal parts by a semipermeable membrane. The molecular weight cut off of the membrane is 100g/mol.
He thinks that this move, combined with some increase in advertising, would enhance annual sales by 35 percent. By how much could advertising be increased with profits remaining unchanged.
Which of these statements is true of earthworms?
Explain why the choanoflagellates and the green algae areevolutionary importance. Which organisms are considered the ancestors of landplants?
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