In mice, single-gene mutations lead to obesity. The Ob gene codes for the protein leptin, a satiety factor that signals the brain when enough food has been consumed. The recessive ob- allele is a loss-of-function allele, so ob-/ob- mice do not secrete leptin into veins and capillaries; they do not experience satiety and therefore become obese. Leptin is...

Question 4 using myplate's daily food plant for 2000 kilocalories as a reference, the servings from the protein foods group in this menu are a. adequate overall, and consistent with the dietary guidelines 2010 recommendations. b. short 2 ounce equivalents. c. inadequate in terms of the recommendations for a 2000 kcal diet. d. adequate overall, but inconsistent with the dietary guidelines 2010 recommendations.

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

The organelle pictured is found in cells of and is theorized to have once been an independent organism.