Which of the following is the best definition of alternative energy? A. Energy sources that can be used in place of fossil fuels. B. Energy sources that can be used in place of coal. C. Energy sources that can be used in place of wind energy. D. Energy sources that can be used in place of hydroelectric energy.

What are the four basic classes of organic molecules how do they differ structurally and functionally

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.