Microbes Were First Formally Observed During the Mid-1600s, but the Cell

question 52

Essay

Microbes were first formally observed during the mid-1600s, but the cell theory was not enunciated until 1839. Write a brief essay explaining why microbiology did not become a formally recognized science until Louis Pasteur's and Robert Koch's time.

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Definitions:

Electromagnetic Radiation

A form of energy that is propagated through space or matter, consisting of electric and magnetic fields that oscillate at right angles to each other.

Nitrogen Cycle

A biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems.

Human Impact

The effects and consequences of human activities on the environment and its natural processes.

Photochemical Smog

Mixture of several air pollutants that injure plant tissues, irritate eyes, and cause respiratory problems in humans.