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You look up in fall of the year and notice birds flying south. Describe the approaches scientists use to learn about nature. Design different measurements you could take and some experiments you might make in order to more fully describe this observation. Answer in detail.
Assume you have isolated C57BL6 trophoblast stem cells and have propagated them on MEFs with heparin. To test for the success of your culture protocol, you are injecting the cells into a C57BL6 blastocyst.
in a large population of range cattle, the following ratios are observed: 49 percent red (RR), 42 percent roan (Rr), and 9 percent white (rr).
I have 30µg of a primer, whose molecular weight is 600. Determine how much water should I add to get a stock primer concentration of 100µM?
Describe the steps of the nitrogen cycle. How is nitrogen lost from ecosystems? How is it replaced? Why does it need to be "fixed?"
Analysis of preserved leaves shows that the density of stomata per unit area has decreased over the past 200 years. Suggest (and support) a hypothesis that explains this phenomenon.
In maize the genes Pl for purple leaves (dominant over green leaves); sm for salmon silk ( recessive for yellow silk) and py for pigmy plant (recessive to normal size) are on chromosome 6 at positions 45, 55 and 65 respectively. Predict the propor..
Explain why a deficiency either of vitamin B12 or of folate causes red blood cells to be larger than normal.
Explain why does a single capillary have a high resistance to the flow of blood and a capillary network of circulation have a low resistance?
Compound with amino groupConsider two small, identical, organic molecules in the cytoplasm of a cell, one with a hydroxyl group (-OH) and the other with an amino group (-NH2).
Choose a neuro-endocrine program in which you can show the importance of structure/function relationship, organization levels, and feedback control.
The binding of an allosteric inhibitor to an enzyme causes the rate of product formation by the enzyme to decrease. Which of the following best explains why this decrease occurs?
Zinc, an essential trace element, may be found bound to the active site of some enzymes. What would be the most likely function of such zinc ions?
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