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A doctor wanted to determine whether there is a relationship between a male’s age and his HDL cholesterol level. The sample below represents ten males selected at random.  Data Table Age, x 38 42 46 32 55 52 61 66 26 38 HDL, y 57 54 34 56 35 40 42 47 44 62 Calculate the value of the correlation coefficient (round to three decimal places).       [r] Is there a significant correlation between x and y? (yes or no)       [sign] Calculate the value of the coefficient of determination (round to three decimal places).     [r-sq] Find the equation of the least-squares regression line (round each coefficient to three decimal places).     y = [a] + [b]x Predict the HDL level for a 42-year-old male (round to the same number of decimal places as y).     [pred]

In the absence of oxygen, yeast cells can obtain energy by fermentation, which results in the net production of which of the following sets of molecules?  

Which of the following results when homologous chromosomes cross over in meiosis?  

In eukaryotes which of the following is the first step in translation?  

Radish flowers may be red, purple, or white. A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The flower color trait in radishes is an example of which of the following inheritance patterns?  

Independent assortment of chromosomes is a result of which of the following processes?  

A student isolates, purifies, and combines in a test tube a variety of molecules needed for DNA replication. When she adds some DNA to the mixture, replication occurs, but each DNA molecule consists of a normal strand paired with numerous segments of DNA a few hundred nucleotides long. What has she probably left out of the mixture?  

Which of the following is most likely to result if a cell is unable to produce histone proteins?  

What is the basis for the difference in how the leading and lagging strands of DNA molecules are synthesized?  

Which of the following relationships among alleles of a single gene best explains the observation that a single change in the gene encoding α-keratin results in chickens with frizzled feathers, increased food consumption, higher heart rate and delayed sexual maturity?