The Increase in Atmospheric Oxygen During the Proterozoic Was Caused

question 61

Multiple Choice

The increase in atmospheric oxygen during the Proterozoic was caused by ____.

• A) a decrease in worldwide volcanism.
• B) a decrease in the size of oceans.
• C) photosynthesis by cyanobacteria.
• D) the appearance of land plants.
• E) formation of banded iron formations

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Definitions:

Concepts of God

Various notions and ideas around the divine or supreme being, encompassing attributes like omnipotence, omniscience, and benevolence.

Sigmund Freud

A neurologist from Austria who established psychoanalysis as a technique for addressing mental disorders through conversational interaction between the psychoanalyst and the patient.

Belief in God

Belief in God encompasses faith or conviction in the existence of a supreme deity or deities, central to many religious traditions.

Irrational

Going against the rules of reason. (Not the same as nonrational, such as when we say that worms and fish are “not rational animals.”) Only rational (that is, thinking, planning, calculating) creatures can be irrational.