Q: Where is chlorine gas produced? Choices: - in the nucleus - carbon cycle - epidermis - at the anode A:
at the anode

Q: Sulfate is used as a cleaning agent because it is acidic and soluble in what substance? Choices: - air - salt - oxygen - water A:
water

Q: What "plumbing" structures inside the veins maintain a unidirectional flow of blood despite the low blood pressure? Choices: - funnels - tubes - pumps - valves A:
valves

Q: What is the name of the relatively large gland in the neck that secretes thyroxin? Choices: - Pancreas - Thyroid - Pituitary - thyroid A:
thyroid