In What Year Did the United States Turn from Being

question 58

Multiple Choice

In what year did the United States turn from being a net creditor to a net debtor to the world?

• A)1980
• B)1985
• C)1990
• D)1995
• E)2000

---

Definitions:

Competitive Exclusion

The ecological principle that two species competing for the same resources cannot coexist at constant population values if other ecological factors remain constant.

Paramecium Caudatum

A species of ciliate protozoan that lives in freshwater environments and is known for its slipper-like shape.

P. Aurelia

A species of single-celled ciliate protozoa that is often studied in genetics and biology.

Mimicry

An evolutionary pattern in which one species becomes more similar in appearance to another.