Can DNA be extracted from dead cells

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

In the water cycle , when does water undergo a chemical change

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