What macromolecule needs mostly carbon and hydrogen

Which part of cellular respiration must occur before any of the other steps can occur

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

Which statement best addresses the differences in sex cell differentiation between the red-eared slider turtle and a human?