Q: What element once commonly used in paint and gasoline has now been found to have dangerous effects? Choices: - plastic - chromium - niacin - lead A:
lead

Q: Fungi may have both asexual and sexual stages of what? Choices: - absorption - development - photosynthesis - reproduction A:
reproduction

Q: The number of neutrons and electrons may vary or change in an atom. what happens to the number of protons? Choices: - decreases - increases - depends - remains the same A:
remains the same

Q: What do we call the region on the lung root formed by the entrance of the nerves at the hilum? Choices: - renal plexus - heart plexus - brain plexus - pulmonary plexus A:
pulmonary plexus