Which of the Following Have Distinct Central Disks and Long

question 8

Multiple Choice

Which of the following have distinct central disks and long, flexible arms?

• A)class Crinoidea (sea lilies and feather stars)
• B)class Asteroidea (sea stars)
• C)class Ophiuroidea (brittle stars)
• D)class Echinoidea (sea urchins and sand dollars)
• E)class Holothuroidea (sea cucumbers)

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Definitions:

Economic Profits

Profits calculated by subtracting both explicit and implicit costs from total revenues, which is a more comprehensive measure of true profitability.

Total Costs

The complete costs involved in the production of goods or services, including both fixed and variable costs.

Output Sold

The quantity of a company's products or services that have been purchased by customers.

Market System

Investment, production, and distribution closely follow supply and demand directives in this economic system, which allows for the free fluctuation of goods and services prices within an unrestricted price system.