Multiple Choice
In the context of organic chemistry laboratory techniques, what is the typical magnification for an oil immersion microscope objective used to observe cellular structures?
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Why were cyanobacteria important to the newly-formed Earth in the context of organic chemistry?
A
They were responsible for the formation of the ozone layer.
B
They were the first organisms to utilize nitrogen fixation.
C
They were the first organisms to produce oxygen through photosynthesis.
D
They contributed to the formation of the Earth's core.
Verified step by step guidance1
Cyanobacteria are ancient microorganisms that played a crucial role in Earth's history, particularly in the context of organic chemistry.
These organisms were among the first to perform photosynthesis, a process that converts light energy into chemical energy, producing oxygen as a byproduct.
Photosynthesis by cyanobacteria led to the accumulation of oxygen in Earth's atmosphere, which was a significant event known as the Great Oxygenation Event.
The increase in atmospheric oxygen allowed for the formation of the ozone layer, which protects the Earth from harmful ultraviolet radiation.
This oxygen-rich environment paved the way for the evolution of aerobic organisms and complex life forms, highlighting the importance of cyanobacteria in Earth's development.
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