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