Which of the following statements is true? viruses do not cause communicable diseases. vaccines are 100 percent effective in preventing disease. communicable disease can be spread by inanimate objects, such as doorknobs. the best way to prevent catching a cold is to get yearly vaccinations.

Answer is Communicable disease can be spread by inanimate objects, such as doorknobs.

The causal organisms of some of the communicable diseases are bacteria and viruses. The communicable diseases such as common cough and cold can be transmitted to a healthy person by indirect contact with contaminated substances such as food, air, soil, feces, equipment, objects including doorknobs, remote controller, etc.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.