____ are living things that are too small to be seen without a ____. They live everywhere on Earth, including the soil, air, and water. They also live on and in larger organisms - including humans. ____ are the largest group of microorganisms. They are ____, which means they consist of only one cell, and they have no nucleus. Bacteria may be shaped like rods, spirals, or balls. Beneficial bacteria that live in our ____ help us digest the food that we eat. But harmful bacteria can live on ____ and eggs and make humans very sick if the food is not ____ well. ____ are like microorganisms in many ways, but scientists do not consider them ____ because they cannot grow and reproduce unless they are attached to a living cell. Viruses cause diseases like ____, ____, and chicken pox . ____ is an illness caused by a virus that created a global ____ a few years ago. ____ look a little like plants, but they can’t make their own food. Fungi are ____, which means they feed on dead or decaying living things. An example of fungi include ____, which makes bread rise.

Microorganisms: Missing words

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