The brain send signals that control the speed at which food moves through the digestive system. What systems are involved? A. Circulatory, Immune, digestive
B. Muscular, Digestive, Immune
C. Digestive, Muscular, Nervous
D. Respiratory, Endocrine, Digestive

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d