What are the findings that supported the hypothesis that insulin serves as a negative feedback signal in the regulation of body fat?
What will be an ideal response?
(1) brain levels of insulin were found to be positively correlated with levels of body fat
(2) receptors for insulin were found in the brain
(3) infusions of insulin into the brains of lab animals were found to reduce eating and body weight
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Who discovered that DNA was the genetic material or transforming factor that could convert nonvirulent R-type Streptococcus pneumoniae bacterium to the virulent S-type?
A. Weismann and Nageli. B. Griffith. C. Avery, MacLeod, and McCarty. D. Hershey and Chase. E. Watson, Crick, Wilkins, and Franklin.
Which of the following parts of angiosperms is
not a food source? a. roots. b. fruits. c. shoots. d. nectar. e. all of these are food sources
What is an advantage of the adjustable gastric band procedure of the gastric bypass?
What will be an ideal response?
The sequence of DNA on each chromosome where the sister chromatids are held together is called the
a. centrosome. b. kinetochore. c. centromere. d. centriole.