Aprotein that fights off foreign substances

If you are going to enter a wrestling competition and need to make a certain weight, which method would best utilize? a: pinch an inch b: circumference measurements c: bathroom scale d: body-fat scale

What advantage is the cell wall in relationship to osmotic pressure

Two shoppers bought meat at the supermarket deli. the first shopper bought 3 pounds of meat for $9,87 . the second bought 4 pounds of meat for $16,76. can you tell if both shoppers bought the same kind of meat.