If you were to design a simple experiment to demonstrate the presence of microorganisms in your surroundings, what would it involve, and what would you expect to observe?
A simple experiment would involve leaving open petri dishes containing nutrient agar (a growth medium) in different locations (e.g., in the air, on a desk, near a plant) for a short period, then covering and incubating them at room temperature. I would expect to observe various colonies of bacteria and fungi growing on the agar surfaces after a few days. Each colony would represent the progeny of a single microorganism that landed on the agar, demonstrating their ubiquitous presence in the environment.