The lac operon in E. coli regulates genes that code for enzymes required for breakdown of lactose. The lac operon is _ operon that is activated in the presence of _. Answers:
1. an inducible
2. lactose

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"d.) carbon dioxide and hydrogen sulfide"

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i don't understand

explanation:

i don't understand your question

carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.