Author Question: Human populations living in temperate, northern climates generally have light skin color because it ... (Read 56 times)

Evvie72 · **on:** Aug 11, 2018

Human populations living in temperate, northern climates generally have light skin color because it

A. helps to prevent rickets.
B. exists in a balanced polymorphism.
C. helps to prevent sickle-cell anemia.
D. helps to protect against skin cancer.
E. protects against hypervitaminosis.

Question 2

________ causes neural tube defects.

A. An overproduction of vitamin D
B. An underproduction of vitamin D
C. A diet rich in fatty fishes
D. The HbS allele
E. The destruction of folate