Excess vitamin D can cause__________that is associated with kidney stone formation and renal (kidney) failure.
A) xerophthalmia
B) hyperkeratosis
C) hypercalciuria
D) macular degeneration
Question 2
Vitamin B12can only be synthesized:
A) by microorganisms such as bacteria and fungi.
B) by higher-order animals themselves.
C) by higher-order plants themselves.
D) artificially in a lab.