Question: Q: What cells carry oxygen? Choices: - marrow cells - white blood cells - lymph cells - red blood cells A:
Answer: red blood cells

Question: Q: What do you call the sudden flow of mud down a slope because of gravity? Choices: - rockflow - typhoon - mountainside - mudslide A:
Answer: mudslide

Question: Q: What according to scientists is the major cause of depression? Choices: - low thyroid levels - high fat diets - high serotonin levels - low serotonin levels A:
Answer:
low serotonin levels