There are an estimated 12,600 spiders in a region of 525 square meters. How many spiders are there per square meter? The population density of spiders is per square meter.

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Well,what i learned was that unlike many other  endothermic  reactions,  photosynthesis  does not absorb energy as heat. instead, during plants absorb energy from sunlight to turn carbon dioxide and water into oxygen and glucose, which is a type of sugar molecule. the energy is stored in the glucose molecules, ready to be used when needed. 

He say that it is