Question: Answer the following question given this paragraph: One useful application of PET scanning is in the diagnosis of Alzheimer's disease. This debilitating condition associated with memory loss primarily occurs in elderly individuals. A protein known as beta-amyloid gradually forms deposits, or plaques, in the brain. Severe memory loss and impaired movement appear to be direct results of the plaque growth. Q: Alzheimers disease is associated with memory loss in what group of people? Choices: - juveniles - prehistoric - immigrants - elderly A:
Answer: elderly

Question: Answer the following question given this paragraph: Q: What is the attraction of a particular atom for the electrons of a covalent bond called? Choices: - conductivity - ionization - electromagnetism - electronegativity A:
Answer: electronegativity

Question: Answer the following question given this paragraph: Test the hypothesis. Make predictions based on the hypothesis and then determine if they are correct. This may involve carrying out an experiment. An experiment is a controlled scientific test that often takes place in a lab. It investigates the effects of one factor, called the independent variable , on another factor, called the dependent variable . Experimental controls are other factors that might affect the dependent variable. Controls are kept constant so they will not affect the results of the experiment. Q: What is the term for the affected factor in an experiment? Choices: - multiple variable - stable variable - independent variable - dependent variable A:
Answer:
dependent variable