A Skill-Biased Technological Change

question 41

Multiple Choice

A skill-biased technological change

• A)increases the MPN of unskilled workers,but reduces the MPN of skilled workers.
• B)changes the MPN of unskilled and skilled workers proportionately.
• C)increases the MPN of skilled workers,but reduces the MPN of unskilled workers.
• D)is a main cause of unemployment.

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Definitions:

Oligotrophic Lake

A type of lake characterized by low nutrient levels, clear waters, and relatively low productivity of plant and animal life.

Net Primary Productivity

The rate at which plants in an ecosystem produce net useful chemical energy; essentially, the amount of biomass created minus the amount used by plants for respiration.

Phytoplankton

Microscopic plant-like organisms that live in aquatic environments, forming the base of many aquatic food webs and producing a significant portion of Earth's oxygen.

Lake Turnover

The seasonal process in lakes where water layers mix, redistributing oxygen from the surface and nutrients from the bottom.