A Problem with Using Blood Type Frequencies in Human Classification

question 4

Multiple Choice

A problem with using blood type frequencies in human classification is that:

• A)it is extremely difficult to collect blood type data
• B)blood type is highly influenced by the environment
• C)most of the frequencies show a clinal distribution
• D)there is very little variation in blood type frequencies from population to population

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Definitions:

Base Level

Base level is the lowest point to which a stream or river can erode its channel, often defined by the body of water into which it flows.

Base Level

The lowest point to which a stream or river can erode its channel, often determined by the body of water into which the river flows, such as an ocean, lake, or larger river.

Subsidence

The process by which the earth's surface sinks or lowers, often due to natural underground material movement or removal of groundwater.

Average Gradient

The average gradient refers to the rate of elevation change over a particular distance, often used in geographical and hydrological analysis to describe slopes.