You must be 21 to use alcohol, use of alcohol underage can have the adult /parent in custody.
Answer:
To avoid cross-contamination, blood must be drawn and collected in tubes in a specific order.
Explanation:
This is known as the Order of Draw. Blood Culture Tubes or Vials. (Rare disease.)
Most generally speaking, the arrows in the food webs/chains represent the flow of energy.
Most typically, the energy will flow from the Sun to the plants, and then those plants are eaten and when they are eaten the energy flows from the plants to whatever animal ate them.
