Which of the Following Are Responsible for High Levels of O₂

question 33

Multiple Choice

Which of the following are responsible for high levels of O₂ in Earth's atmosphere?

• A)photoautotrophs
• B)photoheterotrophs
• C)chemoautotrophs
• D)chemoheterotrophs that perform decomposition
• E)parasitic chemoheterotrophs

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Definitions:

Gram

A metric measurement for weight, quantifying as one thousandth of a kilogram.

Ounce

A unit of weight in the avoirdupois system, equal to 1/16 of a pound or approximately 28.35 grams.

Coffee

A brewed drink prepared from roasted coffee beans, the seeds of berries from certain Coffea species.

Profit

The financial gain realized when the revenue from business activities exceeds the expenses, costs, and taxes associated with sustaining the activity.