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vfiekz [6]
2 years ago
14

Which of the following is not a factor that has contributed to agricultural success in the US? A. expansive infrastructure and m

echanized equipment B. access to expensive chemical fertilizers and pesticides C. controlled population growth D. the prohibition of hybridized crops Please select the best answer from the choices provided. A B C D
Biology
2 answers:
Archy [21]2 years ago
7 0

Answer:

a

Explanation:

i took the test

Tema [17]2 years ago
6 0

Controlled population growth.

Explanation:

US is a highly developed  country and it has expansive infrastructure and highly mechanized agricultural equipments. So first option is not a choice. Second, access to chemical fertilizers and pesticides in a country with such advanced agriculture infrastructure is very easy. Third US is well known for using GM crops.  

US does not have a controlled population growth because if not the birth rate then  migration of people to US is a major concern for that country. Thus, this will be a correct choice for the given question.

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I have attached lac operon model having 4 genes. See attachment for better understanding.

Answer:

The Lac operon is controlled  by two signals.

Initiation

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Addition  of lactose increases the intracellular  concentration of a related compound,  allolactose. allolactose binds to the  Lac repressor, causing it to undergo a  conformational change that releases its grip  on the operator DNa.

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