John Is a Waiter

question 9

Multiple Choice

John is a waiter.He wants to determine if how he greets his customers (specifically whether or not he introduces himself by name) affects his tips.In this situation,the independent variable would be ________

• A)the size of John's tips
• B)the number of repeat customers
• C)the presence or absence of John's name in his greeting
• D)whether or not John's customers address him by name

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Definitions:

Leukopoiesis

The process of producing white blood cells in the body.

Erythrocytes

Red blood cells that carry oxygen from the lungs to the body's tissues and carbon dioxide back to the lungs.

Erythropoiesis

The process through which new red blood cells are created in the bone marrow, a critical component in maintaining healthy oxygen levels in the blood.

Leukocytes

White blood cells that are part of the immune system, protecting the body against both infectious disease and foreign invaders.