Which best describe the structure of dna?

a.
a backbone of bases with sugars on the outside

b.
pyrimidine backbones with purines on the inside

c.
sugar-phosphate backbones with bases on the inside

d.
base backbones with sugars on the inside

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

If there are 350 trout found in 200 square feet of a pond measuring 1000 square feet what is the estimated trout population of the pond? a. 1350 b. 1550 c. 1750 d. 2000

What are the three different shapes, or structures, of carbon-based molecules