In 3–5 sentences explain how the evolution of photosynthetic organisms led to a drastic change in Earth’s atmosphere and oceans. What evidence do we have that this event took place? How did it affect the biosphere?(4 points)
2 answers
The evolution of photosynthetic organisms led to a drastic change in Earth's atmosphere and oceans by releasing oxygen as a by-product of photosynthesis. This led to the oxygenation of the atmosphere, which allowed for the development of more complex life forms and aided in the evolution of aerobic respiration. The evidence for this event includes the geological record of the Great Oxygenation Event, the presence of oxygen in the atmosphere and oceans, and the evolution of aerobic organisms. This event ultimately had a profound impact on the biosphere, allowing for the development of more complex and diverse life forms.
In 3–5 sentences, what is the evidence available for movements of Earth’s crust and continental plates?(4 points)