Answer the following question given this paragraph: An atom is the smallest unit of a chemical element . That is, an atom has all the properties of that element. All atoms of the same element have the same number of protons. Q: What is the smallest unit of a chemical element called? Choices: - cell - droplet - nucleus - atom A:
atom

Answer the following question given this paragraph: Knowledge gained by this basic research on yeast cells has been applied to practical problems. Scientists have developed drugs to treat cancer based on knowledge of the cell cycle. Cancer is a disease in which cells divide out of control. The new drugs interfere with the cell cycle of cancer cells, so the cells stop dividing. This is an example of applied science. The aim of applied science is to find solutions to practical problems. Applied science generally rests on knowledge gained by basic science. Q: What is the name for the disease in which cells divide out of control? Choices: - diabetes - mutation - angina - cancer A:
cancer

Answer the following question given this paragraph: Q: What does the clitellum secrete, while the sperm received are stored temporarily? Choices: - pathogen of mucus - discharge of mucus - amoeba of mucus - cocoon of mucus A:
cocoon of mucus