Why Don't Scientists Know the Exact Number of Species on Earth

question 53

Multiple Choice

Why don't scientists know the exact number of species on Earth?

• A)because about 10,000 new species are identified each year.
• B)because species are becoming extinct at a rate that is too fast to count
• C)because the system used to define what constitutes a species keeps changing
• D)because historical records are inaccurate
• E)Scientists do know. There are 1.8 million existing species on Earth

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Definitions:

Consuming

The act of using goods and services to satisfy needs or wants.

Maximizing Utility

The process of choosing the most satisfying option among available choices based on preferences and constraints.

Marginal Utility

The augmented utility or contentment a person obtains by consuming an extra unit of a good or service.

Smoothie

A thick, smooth drink made from blended raw fruit, vegetables, and sometimes dairy products, typically served cold.