Which of the Following Is True

question 159

Multiple Choice

Which of the following is true?

• A) MSB = MB + Marginal external benefit.
• B) MB = Marginal external benefit - MSB.
• C) MB = Marginal external benefit +

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Definitions:

Sponges

Simple aquatic animals belonging to the phylum Porifera, characterized by porous bodies through which water flows.

Echinoderms

A phylum of marine animals including sea stars, sea urchins, and sand dollars, characterized by radial symmetry and a unique water vascular system.

Nematodes

A phylum of worm-like organisms known as roundworms, which can be found in various habitats and play diverse ecological roles.

Cnidarians

A phylum of aquatic invertebrate animals that includes corals, jellyfish, sea anemones, and hydras, characterized by their cnidocytes, stinging cells used for prey capture and defense.