Which of the following is the best balance to maintain low levels of carbon dioxide in the atmosphere? 1. a small volume of plants with a small number of carbon sources
2. a small volume of plants with a large number of carbon sources
3. a large volume of plants with a small number of carbon sources
4. a large volume of plants with a large number of carbon sources

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