Answer the following question given this paragraph: Have you ever experienced heartburn? Heartburn is actually a condition caused by stomach acid, rather something in your heart. The stomach produces HCl, which is a necessary component of digestion. However, excessive amounts of stomach acid can cause a great deal of discomfort. Various factors can cause the overproduction of acid, mostly related to the types (and amounts) of food and beverages that are being consumed. Caffeine and other oils in coffee (even decaf) will increase HCl production in the stomach. Smoking cigarettes and drinking alcohol also increase the formation of stomach acid. Q: What is a common condition caused by stomach acid? A:

OPTIONS:
- arthritis
- headache
- sunburn
- heartburn

Answer: heartburn

Answer the following question given this paragraph: Generators may be set up to produce either alternating or direct current. Generators in cars and most power plants produce alternating current. Q: What type of current do generators in cars use? A:

OPTIONS:
- magnum current
- direct current
- polar current
- alternating current

Answer: alternating current

Answer the following question given this paragraph: One trait the sponge and tarantula share is lack of a backbone. In fact, they don't have any bones at all. These are defining traits of all invertebrates. Some invertebrates have a skeleton, but it isn't made of bone. Many other traits of invertebrates show considerable diversity. Q: What is one trait that the sponge and tarantula share? A:

OPTIONS:
- lack of ogranic
- lack of a emerge
- lack of a cycle
- lack of a backbone

Answer: lack of a backbone

Answer the following question given this paragraph: Roots are vascular organs that can penetrate soil and even rock. They absorb water and minerals from soil and carry them to leaves. They also anchor a plant in the soil. Roots evolved from rhizoids, which nonvascular plants had used for absorption. Q: What did roots evolve from that plants used for aborption? A:

OPTIONS:
- seeds
- leguminous
- oomycetes
- rhizoids

Answer:
rhizoids