Lesson 901 of 1524
An Invisible World
Microorganisms (or microbes ) are living organisms that are generally too small to be seen without a microscope
Practice this chapterMicroorganisms (or microbes ) are living organisms that are generally too small to be seen without a microscope Throughout history, humans have used microbes to make fermented foods such as beer, bread, cheese, and wine
Long before the invention of the microscope, some people theorized that infection and disease were spread by living things that were too small to be seen. They also correctly intuited certain principles regarding the spread of disease and immunity
Be able to describe how our ancestors improved food with the use of invisible microbes; describe how the causes of sickness and disease were explained in ancient times, prior to the invention of the microscope; describe key historical events associated with the birth of microbiology.
Worked example
What does this chapter state?
- 1Microorganisms (or microbes ) are living organisms that are generally too small to be seen without a microscope
- 2That claim is the chapter’s own statement.
- 3Answer from the claim, not from where the chapter sits in the book.
Result: Microorganisms (or microbes ) are living organisms that are generally too small to be seen without a microscope
Why. The sentence is taken from this chapter’s summary or key concepts.
Answer with the meaning this chapter gives. A nearby idea from the same book is a different term.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.