Q: An ether is an organic compound in which two hydrocarbon groups are bonded to the same atom of what? Choices: - hydrogen - sulfur - nitrogen - oxygen A:
oxygen

Q: Burning of methane is a type of what, which involves the breaking and forming of bonds? Choices: - liquid reaction - physical reaction - toxic reaction - chemical reaction A:
chemical reaction

Q: Q: What term describes a disease in which the immune system attacks the body's own cells? Choices: - contagious - inflammatory - acute - autoimmune A:
A: autoimmune

Question: Q: What are the messenger molecules of the endocrine system? Choices: - neurons - enzymes - acids - hormones A:
Answer: hormones

*Question*
Q: What does the male reproductive system consist of? Choices: - structures that collect urine - structures that produce ova - organs that produce estrogen - structures that produce sperm and secrete testosterone A:
**Answer**
structures that produce sperm and secrete testosterone

(Question)
Q: What kind of relationship between glucagon and insulin is vital to managing fuel storage and consumption by body cells? Choices: - opportunistic - sympathetic - commensalism - antagonistic A:
(Answer)
antagonistic