What is the significance of cell-to-cell communication?

What happens when a magniseum ion ia atracked to a chlrene ion

Food provides molecules that serve as fuel and building material for all organisms. plants undergo photosynthesis and make their own food. other organisms, like us and the horse seen above, are consumers and eat food. how do all organisms use food as fuel? be sure to include the name of the process in your answer. me.

Which level of consumer had access to the smallest apply of energy