D. The repressor is freed from the operator when lactose is present.
Think of a bacteria that comes into contact with some lactose sugar in milk. Normally it's not in milk, so the gene is repressed (prevented) from making the lac enzyme (which digests lactose). Now when it comes across some milk, it wants to make as much lac as possible to eat up all the lactose.
FYI: trp for tryptophan works the exact opposite with repressor blocking when trp IS PRESENT.
I am not totally sure but I think it might biosphere
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Hope this helps!
Explanation:
We as a species should focus on both because Technology and bees are both neccesary components to our daily healthy life.
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I think it may be because of the possibility of the pesticides traveling to Canada by food and crops so it good still harm people there.
