What Is the Greatest Single Source of Air Pollution in the United

question 7

Multiple Choice

What is the greatest single source of air pollution in the United States?

• A) Waste incineration
• B) Power plants
• C) Motor vehicles
• D) Molds

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Definitions:

Monocotyledon

A group of flowering plants whose seeds typically contain one embryonic leaf, or cotyledon.

Eudicotyledon

A major group of flowering plants characterized by the presence of two seed leaves, or cotyledons, upon germination.

Vascular Bundles

Strands of specialized tissue in plants that contain xylem and phloem for the transportation of water, nutrients, and sugars.

Apical Meristem

A region of plant tissue, found at the tips of roots and shoots, responsible for primary growth.