1define system, give one example of system and mention its 3 comonents 2-give one example of negative feedback
3-give one example of positive feedback
4-explain 4 spheres in earth

Regarding most of the narrator’s story, which word best describes the tone?

What's the waste product of electrons and pyruvate combining in fermentation?  

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.