User talk:Emily J. Ionescu/Notebook/Biology 210 at AU

3/21/2015

This was nicely-organized and you made good observations. In the methods, you should note what concentration of rhodamine you used, and what stage the embryos were when you started the experiment. On day 4, did you actually count how many embryos hatched? It is always good to have more quantitative data! If you have preserved fish from day 7, you could measure the lengths of the experimental and control. if you say that the fish look similar, it is good to list exactly what you examined - pigmentation, length, organ development, etc. Your motility measures were good. When you give the propulsion score, remember that an average should be one number ± standard deviation (you gave a range) and say how many fish you tested. LS

3/6/2015 Good job. You could only add whether there is scientific literature about whether both samples are known to be tetracycline-resistant, and is the 2nd species gram positive or negative? LS

2/22/2015

Vert lab - Good job on identification. Make sure you specify which animals you actually observed, and which you deduced lived in your transect, and how you deduced that. You are missing a food web!

Invert lab - Excellent! LS

2/15/2015 Hi Emily, I'm assuming that you ran out of time to finish. It was a good start. See your group's notebooks for comments about plant identification. LS

2/12/2015 Very good. As far as the tetracycline goes, the 10² and 10⁴ plates show that tetracycline is eliminating some of the bacteria, because you have fewer colonies on the tet plates than the nutrient plates. All of the bacteria on the tet plates are antibiotic-resistant. You have fewer colonies with a higher dilution not because the concentration of tet is changing, but because you are plating fewer bacteria to start with. Also you needed to look up a mechanism for how tet kills bacteria. LS

1/30/2015 Your entry started off really well, but you needed to include more description of the protists, such as length, motility, photosynthesizing ability, and a photo or drawing. You are also missing a description of the serial dilution procedure, and a conclusion. LS

1/26/2015 Great! I'm impressed that you already identified two of the plants. LS