객관식
During photophosphorylation, the pH of the thylakoid interior will be _______________.
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9. Photosynthesis
Introduction to Photosynthesis
객관식
An early consequence of the release of oxygen gas by plant and bacterial photosynthesis was to:
A
decrease the amount of carbon dioxide in the atmosphere to nearly zero
B
cause the extinction of all anaerobic organisms
C
increase the concentration of atmospheric O\(_2\), enabling the evolution of aerobic respiration
D
reduce the amount of sunlight reaching Earth's surface
검증된 단계별 안내1
Understand the process of photosynthesis: Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy, producing oxygen gas (O\(_2\)) as a byproduct. This occurs in the presence of sunlight, water, and carbon dioxide (CO\(_2\)).
Recognize the role of oxygen gas (O\(_2\)): The release of O\(_2\) during photosynthesis significantly altered Earth's atmosphere, increasing the concentration of oxygen over time. This change had profound effects on the evolution of life.
Consider the impact on anaerobic organisms: Anaerobic organisms, which do not require oxygen for survival, were affected by the increasing levels of O\(_2\). While some anaerobic organisms went extinct, others adapted to survive in oxygen-rich environments or remained in oxygen-depleted niches.
Understand the evolution of aerobic respiration: The increase in atmospheric O\(_2\) enabled the evolution of aerobic respiration, a more efficient way for organisms to produce energy (ATP) compared to anaerobic processes. This allowed for the development of more complex life forms.
Evaluate the incorrect options: The release of O\(_2\) did not reduce CO\(_2\) to nearly zero, nor did it block sunlight from reaching Earth's surface. Instead, it transformed the atmosphere and paved the way for aerobic life forms to thrive.
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