The world around us is full of living things that we can see, like plants, animals, and people. But there is also another hidden world of tiny organisms that are too small to be seen with the naked eye. These are called microorganisms. They live in air, water, soil, and even inside our bodies. Some of them are useful to us – helping in making food, medicines, and enriching the soil – while others can be harmful and cause diseases. In this lesson, we explore this invisible living world and understand how it affects our daily lives.
Here you will have MCQs from The Invisible Living World with correct answers for practice.

