Which Statement About Oxygen and Ancient Earth Is True

question 23

Multiple Choice

Which statement about oxygen and ancient Earth is true?

• A) The atmosphere of early Earth contained almost as much free oxygen as present-day Earth,but most of this oxygen was lost in the Cambrian.
• B) Early bacteria generated free oxygen as a by-product of the chemical splitting of water.
• C) The oxygen-generating cyanobacteria have gone extinct.
• D) Oxygen concentration increased from near zero to near present-day levels in a nearly straight line upwards.
• E) Early bacteria generated free oxygen as a by-product of the chemical splitting of carbohydrates.

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Definitions:

Benefit Segmentation

A marketing strategy that groups consumers based on the specific benefits they seek from products, allowing for more targeted and effective marketing efforts.

Psychographic Segmentation

A marketing strategy that divides consumers into segments based on their lifestyle, personality traits, values, opinions, and interests.

Geographic Segmentation

The division of a market into different geographical units such as nations, states, regions, cities, or neighborhoods.

Geodemographic Segmentation

A marketing technique that clusters potential customers into groups based on geographical location and demographic characteristics.