4. What is responsible for the natural color of hair?
a. Pigment
c. Piglets
b. Just for men
d. Dye

Number and variety of living organisms includes genetic, species, and ecological types

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen

What is the one part of the nucleotide  that differs among the other different nucle  tides?