The correct answer is "leptin".
Leptin is a hormone secreted by adipose tissue to signal satiety. This hormone works on the arcuate nucleus of the hypothalamus where the satiety center is located. Another hormone, ghrelin, works to signal hunger and also works on the arcuate nucleus of the hypothalamus.
Answer:B. He studied selectively bred animals.
Explanation:
Predicting the genotype of offspring
There are four possible combinations of gametes for the AaBb parent. Half of the gametes get a dominant A and a dominant B allele; the other half of the gametes get a recessive a and a recessive b allele. Both parents produce 25% each of AB, Ab, aB, and ab.
A major environmental concern associated with GM crops is their potential to create new weeds through out-crossing with wild relatives, or simply by persisting in the wild themselves. The potential for the above to happen is assessed prior to introduction, and is monitored after the crop is planted as well.