Many Species Are Introduced Outside Their Normal Ranges Deliberately, for Specific

question 204

Multiple Choice

Many species are introduced outside their normal ranges deliberately, for specific purposes.Some of these (such as the honey bee) integrate into natural communities; others (such as the gypsy moth) reproduce out of control, become pests, and are defined as "invasive." Which of the following could be a difference in the way these two categories of introduced species changed a community's structure?

• A) Only invasive introduced species participated in the native food web.
• B) Only noninvasive introduced species participated in the native food web.
• C) Only invasive introduced species seriously harmed native species.
• D) Only noninvasive introduced species seriously harmed native species.
• E) Only noninvasive introduced species overpopulated or outcompeted native species.

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Definitions:

Allergic Response

An immune system reaction that occurs when the body's defense mechanisms overact to a normally harmless substance.

Substance

A form of matter with distinct properties and composition, such as a chemical element or compound.

Pathogen

Microorganisms such as bacteria, viruses, fungi, or parasites that can cause disease in their host.

Intestinal Mucosa

The innermost layer of the intestine, which is involved in absorption and secretion processes critical for digestion.