The freezing point of a mixture of water and salt is A. higher than that of pure water
B. the same as that of pure water
C. lower than that of pure water
D. none of the above

Calvin ate a candy bar, which caused his body's blood glucose levels to become unbalanced. his body responded by initiating a feedback mechanism to return his body to homeostasis. place the steps of this feedback mechanism in order, starting with the blood glucose imbalance that occurred after calvin consumed the candy bar. a) calvin's blood glucose levels decreased. b) calvin's pancreas stopped secreting insulin. c) calvin's body cells started to take up glucose and store it as glycogen. d) calvin's blood glucose levels increased. e) calvin's pancreas started secreting insulin.

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity