From diffusion of nutrients from underlying layers
It binds lactose which changes its conformation so that is no longer binds to DNA. This allows the lactose operon to be transcribed.
I have 6 but here they are:
01.) Iron Deficiency
02.) Iodine Deficiency
03.) Vitamin B Deficiency
04.) Vitamin B12 Deficiency
05.) Calcium Deficiency
06.) Vitamin A Deficiency
What is the A-D section of the paper, or is that one not important (i will help you in the comments after i know that information)