Based off the graph answer the question. Right now, a lot of biofuel is made from corn grain. If society were to switch to biofuels made from grass, which of the following statements correctly states the overall difference in energy input per hectare of crop?   A. Society would use about the same amount of energy in crop growth.   B. Society would use about 90% more energy per hectare of crop.   C. Society would use about 90% less energy per hectare of crop.

AP Environmental Science Primary Productivity Problems   Net Primary Productivity efficiency can be calculated for terrestrial producers when values for insolation energy, respiration loss and gross productivity are known. Use the equations below to answer the following problems:   Net Primary Productivity = Gross Productivity – Respiration Loss   Efficiency = .          NPP           . X 100                      Insolation Energy   In a rice paddy in Southeast Asia, the insolation energy is 6,000,000 calories/m2/day. The gross productivity of the rice is 0.012 grams/cm2/day, and the respiration loss is 20 percent. One gram of rice is equivalent to 1000 calories.   Calculate the net primary productivity of the rice.               Find the efficiency of photosynthesis by the rice.   Could you mostly help me set it up and find it? So I can learn how to do it.

Can some please answer this

In the processes of photosynthesis and cellular respiration, carbon is cycled between all major spheres on Earth. Plants obtain carbon dioxide from the atmosphere as one reactant to conduct photosynthesis. Carbon dioxide is produced by organisms as a result of carrying out cellular respiration. Activity 1 Which claim is correct about the cycling of matter and the flow of energy in the carbon cycle? A. In the ecosystem, matter flows and energy cycles. B. In an ecosystem, both matter and energy cycle. C. In an ecosystem, matter cycles and energy flows. D. In an ecosystem, both matter and energy flow.