Why Did the Lactose Tolerance Mutation in the East African

question 67

Multiple Choice

Why did the lactose tolerance mutation in the East African herders spread so rapidly within the population?

• A) Milk provided calcium for strong bones.
• B) It was a selective advantage for survival during droughts and cold winters.
• C) Lactose was a better source of energy than glucose.
• D) Milk was a good source of protein during the summer harvests.

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Definitions:

Packet Switching

A method of grouping data that is transmitted over a digital network into packets which are then sent independently and can take different paths to the destination.

Running Costs

Ongoing expenses required for the day-to-day operation of a business, service, or system.

Packet-Switching Networks

A digital networking communications method that groups transmitted data – irrespective of content, type, or structure – into suitably-sized blocks, called packets, for efficient routing.

Fault Intolerant

Systems or components that are unable to continue operating properly in the event of a failure or error.