Culturing Methods Often Detect Organisms That May Be Rare in the Environment

question 18

Multiple Choice

Culturing methods often detect organisms that may be rare in the environment but prevail when nutrients appear. What are these typically called?

• A) weed organisms
• B) protists
• C) rhizobia
• D) OTUs
• E) microbial dark matter

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Definitions:

Phospholipid

A type of lipid molecule that is a major component of cell membranes, made up of two fatty acids, a phosphate group, and a glycerol backbone.

Protein

Large, complex molecules made up of amino acids that perform a vast array of functions including structural, enzymatic, and regulatory roles in cells.

Hypotonic Solution

A solution that has a lower concentration of solutes relative to another solution, causing cells to swell as water moves inside them.

Hypertonic Solution

A solution that has a higher solute concentration compared to another solution, which can lead to the movement of water out of a cell.