In Marine Sediments, CO₂ Is Reduced to CH₄ By

question 43

Multiple Choice

In marine sediments, CO₂ is reduced to CH₄ by:

• A) bacteria containing proteorhodopsin
• B) oxygenic cyanobacteria
• C) methanotrophic archaea
• D) methanogenic archaea
• E) none of the above

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Definitions:

Spending Variance

The difference between the actual amount spent and the budgeted amount for a particular category or period, indicating over or under spending.

Planning Budget

A financial plan that estimates the revenue and expenses for a specific period, often used for setting performance expectations.

Revenue and Spending Variance

The difference between the budgeted and actual amounts of revenue and expenditure over a specific period.

Net Operating Income

Income from a company's core business operations, excluding deductions of interest and taxes.