In plants and algae, is the source of the electrons needed for photosynthesis.

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?

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 number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give