Why Is There Free Oxygen in the Air

question 33

Multiple Choice

Why is there free oxygen in the air?

• A)Organisms need oxygen to manufacture ATP.
• B)Free oxygen has been present since the formation of the earth's atmosphere.
• C)Evaporation of the oceans liberated oxygen.
• D)It is a by-product of photosynthesis.
• E)Free oxygen has seeped from cracks in the earth's crust.

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Definitions:

Cognitive Salient

The aspect of being noticeable or prominent in the mind, especially when referring to specific thoughts or stimuli.

Top-Down

In decision-making and information processing, this term describes an approach where decisions or analysis start from a broader, general perspective and move towards more specific details.

Bottom-Up

A processing approach in which analysis starts with the smaller, detailed elements and builds up to a comprehensive picture.

Impression Formation

The process by which individuals form opinions and judgments about other people based on available information and social cues.