Why Doesn't a Flatworm Have a Circulatory System

question 13

Multiple Choice

Why doesn't a flatworm have a circulatory system?

• A) The animal is thin enough to permit effective gas exchange by diffusion.
• B) There is not enough room for a circulatory system because of the large gastrovascular cavity.
• C) The animal lacks muscles, so it could not have a heart to pump blood.
• D) Only bilaterally symmetrical animals need a circulatory system.
• E) Only vertebrates have circulatory systems.

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Definitions:

Risk Avoidant

Characterizes individuals or strategies that prioritize minimizing potential losses or risks.

Justice Principle

The ethical concept that emphasizes fairness and the equitable treatment of individuals in decision-making processes and distribution of resources.

Profits

The financial gain obtained when the revenue generated from business activities exceeds the expenses, costs, and taxes needed to sustain the activity.

Groupthink

A psychological phenomenon that occurs within a group of people when the desire for harmony or conformity results in an irrational or dysfunctional decision-making outcome.