The rise of photosynthetic organisms:
A) decreased the concentration of oxygen in the atmosphere decreasing polar ice caps.
B) decreased the concentration of oxygen in the atmosphere increasing polar ice caps.
C) raised the concentration of oxygen in the atmosphere increasing polar ice caps.
D) raised the concentration of oxygen in the atmosphere decreasing polar ice caps.
Correct Answer:
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Q20: Leaves of many plants "turn" colors in
Q21: In photosynthesis,the carbon in CO2 is being
Q22: The energy sources needed for the light
Q23: The rise of photosynthetic organisms:
A)raised the concentration
Q24: Photosystem I and photosystem II are respectively
Q26: The carbon atoms in cellulose found in
Q27: Photosystem I produces:
A)NADPH.
B)ATP.
C)glucose.
D)water.
E)NADH.
Q28: Photosystem II produces:
A)water.
B)NADPH.
C)glucose.
D)NADH.
E)ATP.
Q29: If ozone layers in the atmosphere are
Q30: The Calvin Cycle:
A)is a cyclic pathway that
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