In Terms of Community Ecology, Why Are Pathogens Often More

question 28

Multiple Choice

In terms of community ecology, why are pathogens often more virulent now than in the past?

• A) More new pathogens have recently evolved.
• B) Host organisms have become more susceptible because of weakened immune systems.
• C) Human activities are transporting pathogens into new habitats (or communities) at an unprecedented rate.
• D) Medicines for treating pathogenic disease are in short supply.

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Definitions:

Proposition

A statement that expresses a judgment or opinion that can be either true or false.

Relationship

The manner by which two or more ideas, items, or individuals are linked together, or the condition of being linked.

Contrapositives

Logical statements that are derived by inverting and negating both the antecedent and the consequent of an original implication; often used in logical proofs.

Relationship

A connection, association, or involvement between two or more entities.