A presumptive Test presumes the pet presence of the question substance it is useful because it tells the drug is used false positive is possible meaning that the test result is positive but the substance is not present.
Answer:
Chemical and mechanical digestion are the two methods your body uses to break down foods. Mechanical digestion involves physical movement to make foods smaller. Chemical digestion uses enzymes to break down food.
Explanation:
Answer:
reduce exposure to foreign substances. humidify and warm inhaled air. increase air flow to arteries, veins
The answer above is incorrect. The correct answer is James Watson accompanied by Francis Crick.
