Answer the following question given this paragraph:   Forests are also being destroyed. Trees may be cut down for their wood, or they may be burned to clear the land for farming. Burning wood releases more carbon dioxide into the atmosphere. You can see how a tropical rainforest was cleared for farming in Figure below . With forests shrinking, there are fewer trees to remove carbon dioxide from the air. This makes the greenhouse effect even worse.   Q: What does burning wood release into the atmosphere?   Choices:  - oxygen  - helium  - hydrogen chloride  - carbon dioxide  A:
carbon dioxide

Answer the following question given this paragraph:   Body waves travel through the Earth and arrive at seismograms before surface waves.   Q: Body waves travel through the earth and arrive at seismograms before what?   Choices:  - sound waves  - velocity waves  - function waves  - surface waves  A:
surface waves

Answer the following question given this paragraph:      Q: How many sets of chromosomes do gametes contain?   Choices:  - twelve  - four  - eight  - single  A:
single

Answer the following question given this paragraph:   Anabolic Steroids The endocrine system can be exploited for illegal or unethical purposes. A prominent example of this is the use of steroid drugs by professional athletes. Commonly used for performance enhancement, anabolic steroids are synthetic versions of the male sex hormone, testosterone. By boosting natural levels of this hormone, athletes experience increased muscle mass. Synthetic versions of human growth hormone are also used to build muscle mass. The use of performance-enhancing drugs is banned by all major collegiate and professional sports organizations in the United States because they impart an unfair advantage to athletes who take them. In addition, the drugs can cause significant and dangerous side effects. For example, anabolic steroid use can increase cholesterol levels, raise blood pressure, and damage the liver. Altered testosterone levels (both too low or too high) have been implicated in causing structural damage to the heart, and increasing the risk for cardiac arrhythmias, heart attacks, congestive heart failure, and sudden death. Paradoxically, steroids can have a feminizing effect in males, including shriveled testicles and enlarged breast tissue. In females, their use can cause masculinizing effects such as an enlarged clitoris and growth of facial hair. In both sexes, their use can promote increased aggression (commonly known as “roid-rage”), depression, sleep disturbances, severe acne, and infertility.   Q: What performance-enhancing drugs are synthetic versions of the male sex hormone, testosterone?   Choices:  - catabolic steroids  - progesterone  - estrogen  - anabolic steroids  A:
