Briefly explain about postive and normatuve analysis of economic and give 5 examples each
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What advantage is the cell wall in relationship to osmotic pressure

What is the main difference between trace elements and the main elements that make up the body? 1) main elements consist of heavier atoms. 2) trace elements are only needed in small amounts. 3) trace elements consist of heavier atoms. 4) main elements are only needed in small amounts.

Which of the following terms describes the number of individuals an area can support? food chain ecosystem limiting factors carrying capacity