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Ch. 3 - Observing Microorganisms Through a Microscope
Chapter 3, Problem 28.10a

NAME IT Van Leeuwenhoek was the first to see this budding microbe with a nucleus and cell wall; although humans have used it since before the beginning of recorded history, Louis Pasteur was the first to figure out what it does.

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Identify the microbe described in the problem. It is a budding microbe with a nucleus and cell wall, which suggests it is a eukaryotic organism.
Consider the historical context: Antonie van Leeuwenhoek was the first to observe this microbe, indicating it was discovered in the 17th century.
Recognize the significance of Louis Pasteur's work: he discovered the role of this microbe in fermentation, which is a key process in food and beverage production.
Connect the characteristics and historical context to identify the microbe as yeast, specifically Saccharomyces cerevisiae, commonly used in baking and brewing.
Understand that yeast is a unicellular fungus, which fits the description of having a nucleus and cell wall, and is known for its role in fermentation, as elucidated by Pasteur.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Budding Microbes

Budding microbes refer to a type of asexual reproduction where a new organism develops from an outgrowth or 'bud' of the parent organism. This process is common in certain fungi and yeasts, allowing for rapid population growth. Understanding budding is essential for recognizing how these organisms proliferate and adapt in various environments.
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Cell Structure

The cell structure of microbes includes key components such as the nucleus and cell wall. The nucleus houses genetic material, while the cell wall provides structural support and protection. Recognizing these features is crucial for distinguishing between different types of microbes and understanding their functions and interactions in ecosystems.
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Fermentation

Fermentation is a metabolic process that converts sugars to acids, gases, or alcohol in the absence of oxygen. Louis Pasteur's research on fermentation revealed its significance in food production and preservation, as well as its role in various industrial applications. This concept is vital for understanding how microbes can be harnessed for beneficial uses in biotechnology and food science.
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