The answer is B. Rene Descartes
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When an inducer or a possible effector molecule binds to the repressor protein, there is a conformational change within the repressor protein causing it to fall of the DNA sequence that it has bounded to.
This allows gene transcription to occur. As the RNA polymerase can access the promoter sequence for instance.
Marine regions cover about three-fourths of the Earth's surface and include oceans, coral reefs, and estuaries. Marine algae supply much of the world's oxygen supply and take in a huge amount of atmospheric carbon dioxide. The evaporation of the seawater provides rainwater for the land.
