You Are Looking at a Sample from the Top Green

question 66

Multiple Choice

You are looking at a sample from the top green layer of a colorful bacterial mat. Using phase contrast and fluorescence microscopy, you see evenly spaced cells in the middle of a filament that are slightly smaller than the others. The smaller cells are not fluorescent, indicating they lack photosystem II, but the rest of the filament is fluorescent. What type of filamentous bacteria are you most likely looking at?

• A) purple nonsulfur bacteria
• B) green sulfur bacteria
• C) Acidobacteria
• D) Cyanobacteria

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Definitions:

Janitorial Department

A division within an organization dedicated to the maintenance and cleaning of buildings and facilities.

Allocated Based on Space

The distribution of resources or costs among departments or projects according to the physical area they occupy or require.

Personnel Department Cost

Expenses related to the operation of a human resources department, including salaries, training, and benefits administration.

Step-Down Method

An accounting method used to allocate the costs of service departments to producing departments and other service departments in a sequence.