Look at the image below. The leaves of the unhealthy plant are yellow. What substance is missing from them but present in green leaves?
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In which state was more than 100 billion tons of coal mined in 2005?

Which set of terms best describes a community of miners who live out in the countryside of west virginia and use specialized geographical equipment to analyze the composition of rocks

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm