Food Webs Can Be Regulated by Mostly Top-Down or Mostly

question 72

Multiple Choice

Food webs can be regulated by mostly top-down or mostly bottom-up control.Which is an example of mostly bottom-up control?

• A) Australian cactus moths control prickly pear cactus.
• B) Coyotes control rodents in a grassland.
• C) Lynx control snowshoe hares in the tundra.
• D) Sea otters control sea urchins in a kelp forest.
• E) Nutrients from upwelling control a coastal ocean ecosystem.

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Definitions:

Invisible Hand

A term coined by Adam Smith to describe the self-regulating nature of the marketplace, where individuals' pursuit of self-interest leads to the benefit of society at large.

Adam Smith

An 18th-century Scottish economist known as the father of modern economics, best remembered for his theory of the invisible hand.

Wealth Of Nations

A seminal book by Adam Smith, published in 1776, that discusses what builds nations’ wealth, emphasizing the importance of a free market economy.