​Jellyfish Are ____

question 30

Multiple Choice

​Jellyfish are ____.

• A) ​polyp forms of cnidarians
• B) ​medusae forms of cnidarians
• C) ​spongiforms of cnidarians
• D) ​spongiforms of echinoderms
• E) polyp forms of echinoderms​

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Definitions:

Reversed Magnetic Polarity

A condition where the magnetic north and south poles swap positions, a phenomenon observed in the Earth's geological history.

Compass Needle

The magnetized pointer on a compass that aligns itself with the Earth's magnetic field to indicate the direction of magnetic north.

Seamounts

Underwater mountains formed by volcanic activity, not reaching the ocean's surface, and often a hotspot of marine life.

Island Chains

Sequential islands formed close to each other, often as a result of volcanic activity, and stretching out over distances in the ocean.