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HQ4-Chap.31-32 1- What is the element required for amino acid synthesis? 2- Which element is a component of chlorophyll? 3-Which element is missing when leaf are dying prematurely? 4-Which elements are missing when plants develop red leaf bases? 5-Which element results in anemia when in shortage? 6-Which drug result in limb deformities when taken during pregnancy? 7- A plant which needs a minimum number of hours of darkness (or more) to flower is called what? 8- Example of a long day plant. 9- What is the name given to plants which grow in the absence of light 10- How does the length of daylight affect the biology of mammals? • • • • • • • • • • 1- Nitrogen 2- Magnesium 3- Potassium 4- Phosphorus and nitrogen 5- Iron 6- Thalidomide 7- Short day plant 8- Spinach 9- Etiolation 10- Gonad development