A double helical structure where two strands of DNA run antiparallel to
each other. How does this structure cause the number of
purines to equal the number of pyrimidines as observed by
Chargaff?

Which of these would most likely be a stimulus that would cause the body to initiate feedback mechanisms a.) normal body temperature in an arctic environment b.) normal boy temperature in a tropical environment c.)light physical activity d.)low blood sugar