For Most Terrestrial Ecosystems, Pyramids Composed of Species Abundances, Biomass

question 55

Multiple Choice

For most terrestrial ecosystems, pyramids composed of species abundances, biomass, and energy are similar in that they have a broad base and a narrow top. The primary reason for this pattern is that ________.

• A) secondary consumers and top carnivores require less energy than producers
• B) at each step, energy is lost from the system
• C) biomagnification of toxic materials limits the secondary consumers and top carnivores
• D) top carnivores and secondary consumers have a more general diet than primary producers

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Definitions:

Absolute Purchasing Power Parity

A theory that suggests that the price of goods in different countries should be equal when measured in a common currency.

Exchange Rate

The price of one country's currency in terms of another currency or currencies.

Inflation

The pace at which prices for a wide range of goods and services elevate, depreciating the power to purchase.

Exchange Rate

The rate at which one currency can be exchanged for another.