Under which of these conditions would scientists use the polymerase chain reaction (PCR) before they analyze a DNA sample? A The DNA sample comes from a bacterium or virus.

B
The DNA sample has been cut into fragments by restriction enzymes.

C. Only a small amount of the DNA sample is available

D. The DNA sample includes regions that are transcribed into mRNA.

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.

haploid cells;

on the planet jupiter, the acceleration due to gravity is approximately 26 m s2 , roughly 2.7 times the acceleration due