How does the concentration of sucrose affect the rate of fermentation of yeast?

The homogeneity of the chloride level in a water sample from a lake was tested by analyzing portions drawn from the top and from near the bottom of the lake, with the following results in ppm Cl: Top     Bottom   26.30 26.22 26.43 26.32 26.28 26.20 26.19 26.11 26.49 26.42   (a) Apply the t-test at the 95% confidence level to determine if the chloride level from the top of the lake is different from that at the bottom. At 95% confidence t crit =  , and t =  . Since t (>,<,=) we conclude that (a,no) significant difference exists at the 95% confidence level. (b) Now use the paired t-test and determine whether there is a significant difference between the top and bottom values at the 95% confidence level. At 95% confidence t crit =  and t =  . Since t (>,<,=) we conclude that (a,no) significant difference exists at the 95% confidence level. (c) Why is a different conclusion drawn from using the paired t-test than from just pooling the data and using…

Dichotomous Keys are used to identify an organism based on a choice between character states. Can you answer all the parts to this question please in complete sentences  Based on the name, how many options should you have when working with a dichotomous key?  Why does the term “dichotomous” let you know that? (hint: look up the Greek roots and meanings for this word)

In spectrophotometry, we measure the concentration of an analyte by its absorbance of light. A low concentration sample was prepared, and nine replicate measurements gave absorbances of: 0.0047, 0.0054, 0.0062, 0.0060, 0.0046, 0.0056, 0.0052, 0.0044, 0.0058. Nine reagent blanks gave values of: 0.0006, 0.0012, 0.0022, 0.0005, 0.0016, 0.0008, 0.0017, 0.0010, and 0.0011. a) What is the absorbance detection limit?       This is related to both the scatter of the blank and the scatter in the measured samples.

If only the first five loci listed in Table 1 of the assigned paper  (Forensics, DNA Fingerprinting, and CODIS) were analyzed, what would be the statistical probability of finding that particular genotype among people other than Suspect B? SHOW YOUR WORK!   Hint: Multiply together the frequencies of the individual STR genotypes to obtain the overall profile frequency.

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Using the data below, calculate the correlation: covariance   -0.9 standard deviation(x) = 10.5 standard deviation(y) = 10.4   (calculate to 2 significant figures)

1)  The interior of an axon at rest     is negatively charged relative to the outside     is positively charged relative to the outside     has the same charge as the outside     has the same concentration of potassium (K+) as the outside 2)  The branch-like portions of a neuron that carries information toward the cell body is the     axon.     dendrite.     terminal button.     soma.

After graduating from UNC Charlotte with the BS in Biology, you are hired as a technician in a U. S. Department of Agriculture Research Station and assigned to a team that is investigating a new malady that has appeared in leaf cutter bees (shown below).  Leaf cutter bees are solitary (i.e. non-social) bees which are essential pollinators for many of the crops that we feed livestock, such as alfalfa.  The bees are becoming infected with a gram-positive bacteria that alters their immune response such that the bacteria cannot be eliminated and eventually the bees die.  Your team is investigating how the bacteria might alter the bees’ immune response.  You set up two groups of leaf cutter bees:  the Treatment group is infected with the bacteria and the Control group is uninfected.  You then compare the two groups for the different components of the insect immune system shown in the figures below (in Fig. 3 GLD = FAD-glucose dehydrogenase).  Remember:  P > 0.05 means the differences are…