The amount of energy becomes weaker as it transfers between organisms. This “lost energy” is dissipated in the form of heat.
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The immune system has a vital role: It protects your body from harmful substances, germs and cell changes that could make you ill. It is made up of various organs, cells and proteins.
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D.Xylem transports the water
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I'm sorry but you should do it on your own because if you don't you won't learn the way you should and plus that is cheating.
Because of human intervention, the former tend to be simpler and more predictable, because fewer organisms--crops or animals--are involved and everything is monitored/
