Genes and Phenotypic Adaptation Work Together to Produce a Biochemical

question 33

Multiple Choice

Genes and phenotypic adaptation work together to produce a biochemical difference between human groups in the ability to digest large amounts of milk.This is an adaptive advantage when

• A) herding societies shift to a sedentary agricultural lifestyle.
• B) mothers cannot wean their children from breast milk after they turn one year old.
• C) other foods are scarce and milk is available, as it is in herding societies.
• D) there is not enough lactose in the diet.
• E) lactase, the enzyme that breaks down lactose, is not produced in enough quantities to keep up with dietary intake.

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Definitions:

Comparative Advantage

The ability of an individual, company, or country to produce a particular good or service at a lower opportunity cost than its competitors.

Import

The act of bringing goods or services into a country from abroad for the purpose of trade.

Export

The sale of goods or services from one country to another.

Trucks

Large heavy-duty vehicles designed for transporting goods and materials over long distances.