The Current Population of the Earth Is About ________

question 39

Multiple Choice

The current population of the Earth is about ________.

• A) 2 billion
• B) 5 billion
• C) 7 billion
• D) 9 billion
• E) 500,000

Understand the role of the water cycle in shaping terrestrial and aquatic ecosystems.

Understand the reasons for the incompleteness of the fossil record.

Distinguish between macroevolution and microevolution.

Recognize the types of natural selection and their impacts on population characteristics.

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Definitions:

Photovoltaic Panels

Devices that convert sunlight directly into electricity through the photovoltaic effect.

Biomass Energy

energy produced from organic materials, such as plant and animal waste, used as fuel.

Ethanol

A type of alcohol that is produced when corn, sugarcane, and other plant material is soaked in ammonia, fermented, and distilled.

Hydroelectric Dams

Structures built across rivers to control water flow and generate electricity through the movement of water through turbines.