A Consequence of Organelle Heredity Is That Sequence Changes in MtDNA

question 3

Multiple Choice

A consequence of organelle heredity is that sequence changes in mtDNA vary more than nuclear DNA in response to reduction in population size. Which of the following does this imply about human evolutionary history?

• A) Mitochondrial variants in people descending from originally small populations show enough diversity to be used to construct an evolutionary tree.
• B) The original human population must have grown to be quite large before its members began migrating to other lands and other continents.
• C) Nuclear gene sequencing must be used to resolve the question of human ancestral origins.
• D) Current human populations must have a much higher mutation rate than ancient populations.
• E) A single human population, living about 200,000 years ago, could not have given rise to all current human populations.

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Definitions:

Shirking

The behavior of avoiding or evading work responsibilities, often in employment settings.

Industrial Unions

Labor unions that represent all types of workers within an entire industry, focusing on broad industry-level labor issues and negotiations.

Craft Unions

are labor unions that represent workers specialized in particular trades or crafts, focusing on securing favorable employment conditions and maintaining standards within their fields.

Supply of Labor

The total hours that workers in an economy are willing to work at a given wage rate.