Which of the Following Have Distinct Central Disks and Long,flexible

question 1

Multiple Choice

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

• A)class Crinoidea
• B)class Holothuroidea
• C)class Echinoidea
• D)class Asteroidea
• E)class Ophiuroidea

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Definitions:

Age of Fossil

The determination of the time period from which a fossil originates, often through radiometric dating.

Radiometric Dating

A method for determining the age of an object based on the decay rate of radioactive isotopes contained within it.

Measured

Quantified or assessed using specific units or tools, indicating a calculated or carefully determined amount.

Analogous Structures

Features of different species that perform similar functions but have evolved separately, indicating convergent evolution.