CollegeBoard Pre-AP A The food web shows selected organisms in a coastal ecosystem in Florida. Which of the following correctly describes the ecological role of organisms in the food web? Zooplankton are the primary producers, and the consumers produce the carbon dioxide that zooplankton use to make energy. B C D Seagrass Phytoplankton Pelicans rely on the ability of phytoplankton to use sunlight to combine water and carbon dioxide to produce sugars. Tiger sharks use the fats and proteins in seagrass for energy. Green sea turtles are secondary consumers that convert energy from the Sun into sugar. 6 O

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Microbes

Microbes are microscopic living organisms that can only be detected with the help of specialized laboratory equipment called a microscope. These living organisms are so small that they are not visible to the naked eye.