What are microbes?

Microbes are defined as living organisms that are often too small to be seen without the aid of a microscope. This category includes a variety of organisms such as bacteria, viruses, fungi, and protozoa. They play essential roles in various ecosystems, including decomposing organic matter, aiding in digestion, and even contributing to food production through fermentation processes.

The other options do not accurately define microbes. The first option refers to large organisms that can be seen with the naked eye, which does not encompass the nature of microbes. The third option incorrectly limits microbes to only harmful bacteria, overlooking the beneficial microorganisms that exist. The fourth option states that these germs do not cause illness, which is misleading, as some microbes can indeed be pathogenic, while others are harmless or beneficial. Thus, the definition of microbes as small living organisms provides a comprehensive understanding of their significance in both health and the environment.