What is the total magnification of this dissecting microscope?

This graph shows 3 enzyme reactions in which the only difference was the temperature conditions. What can you conclude from the graph?

When extracting DNA from plant cells, wheat germ and strawberries are common sources of DNA because they are polyploidy.  Why is this important?

The ability to taste PTC (phenylthiocarbamide) on paper strips… (Select all that are correct)

What genotype would be a good candidate to perform a test cross with an unknown individual?

In an experiment of the effect of fertilizer on tomato plant growth, Rick decides to apply the fertilizer to only some of the plants and use the rest as controls to compare. He applies fertilizer to the 2 smallest plants. When he measures their growth at the end of the week, he finds the plants treated with fertilizer haven’t grown as much as the untreated plants. What is the biggest mistake Rick made with his experiment?

You set up a model cell with pure water inside the bag (or model cell), and glucose as the solution in the beaker. After 30 minutes you tested the contents of the bag and the beaker for the presence of glucose using the Benedict’s Test. What do the results in the picture indicate? Orange/red indicates high levels of a reducing sugar (such as glucose), blue is the absence of a reducing sugar.

You measured and recorded the mass of a potato slice before placing it in an unknown solution.  You recorded the weight as 23 grams.  You placed the potato slice in the unknown solution, and let it soak in the solution for 24 hours.  After that, you re-measured the mass of the potato slice and found that the mass had decreased to 11 grams after soaking.  Given this information, what can be said about the osmolarity of the unknown solution?

Which of the following items SHOULD be disposed of in the container below? (Select all that apply)

The data shows the results from a cross in corn between a purple, rough individual and a yellow, smooth individual (Ppss x ppSs). Results were collected from 40 offspring.     Classes   PpSs Ppss ppSs ppss Expected 10 10 10 10 Observed 15 4 16 5  X2 = ∑(d2/e)d (deviation) = observed – expectedBased on the information given, calculate the chi-square value.