The Discrepancy Between the Number of Microbial Cells Observed by Microscopic

question 34

Multiple Choice

The discrepancy between the number of microbial cells observed by microscopic examination and the number of colonies that can be cultivated from the same natural sample may be due to ______.

• A)nonviable organisms
• B)incorrect culture conditions
• C)microbial motility
• D)nonviable organisms and incorrect culture conditions

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Definitions:

Spiral

A curve that winds around a fixed center point at a continuously increasing or decreasing distance from the point.

Spirogyra

A genus of filamentous green algae known for its spiral chloroplasts and its role in freshwater ecosystems.

Agar

Agar is a gelatinous substance derived from red algae that is used as a growth medium in microbiological work, as well as a thickener in food products.

Red Algae

Marine photosynthetic protists with a notable abundance of phycobilin pigments; includes coralline algae of coral reefs.