Which of the Following Is Not a Pure Substance

question 34

Multiple Choice

Which of the following is not a pure substance?

• A) pure gold
• B) clean air
• C) refined sugar
• D) distilled water

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Definitions:

Follicle-Stimulating Hormone

A substance produced by the front part of the pituitary gland which prompts the development of ovarian follicles in women and the generation of sperm in men.

Lymphatic System

Part of the immune system, comprising a network of lymphatic vessels that carry a clear fluid called lymph towards the heart, involved in removing waste and fighting infections.

Exocrine System

A network of glands in the body that secrete substances directly into ducts leading to the exterior of the body, such as sweat, saliva, and digestive enzymes.

Blood

A vital liquid in humans and many animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.