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What happens as you go down each of these groups?

Why is classification important?

What does the environment ,in which an organism lives, need to provide?

What happens if there is a short supply of any of these?

What will happen to some organisms?

What else can the changes effect?

What can cause extinction?

How is energy transferred in ecosystems?

Equation to work out how much energy is lost.

Equation to work out efficiency.