During photosynthesis:
A) chlorophyll-bearing plants convert oxygen and water to organic sugars and release carbon dioxide.
B) chlorophyll-bearing plants convert carbon dioxide and water to organic sugars and release oxygen.
C) primitive bacteria convert hydrogen and oxygen into water.
D) primitive bacteria obtain energy from reactions with minerals.
Correct Answer:
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Q21: _ is the release of volatiles from
Q22: The layer of air closest to the
Q23: The largest source of air pollutants in
Q24: James Lovelock used the term _ to
Q25: The Earth's modern atmosphere:
A) is composed of
Q26: The highest portion of the atmosphere that
Q30: In the _, temperature increases with altitude,
Q30: _ were among the earliest photosynthetic life-forms
Q31: Atmospheric pressure is measured in _.
A) degrees
Q32: The atmosphere:
A) becomes less dense with increasing
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