You Are Studying a Mini-Ecosystem That You Created from Samples

question 6

Multiple Choice

You are studying a mini-ecosystem that you created from samples of lake water, plants, and sediment. Your teacher tells you to drop about 10 sesame seeds on the top of the water because they will attract some interesting organisms. One week later, you see that the seeds are surrounded by white fuzz that is extending off of the seeds, and you conclude that the decomposing seeds have been colonized by

• A) diatoms.
• B) brown algae.
• C) unikonts.
• D) water molds.

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Definitions:

Carboxylic Acid

Organic compounds containing a carboxyl group (-COOH), characterized by their acidic properties and widespread occurrence in nature.

13C NMR Spectrum

A representation of the nuclear magnetic resonance of carbon-13 atoms within a molecule, revealing the distinct chemical environments of carbon atoms.

Carbonyl Carbon

The carbonyl carbon is the carbon atom of a carbonyl group (C=O), doubly bonded to an oxygen atom and bonded to two other atoms or groups, which can vary depending on the specific carbonyl compound (e.g., aldehydes, ketones).

Cyclohexylacetic Acid

An organic compound featuring a cyclohexane ring attached to an acetic acid group, used in the synthesis of various pharmaceuticals and chemical products.