What is the main difference between poriferans and cnidarians?
Marine Science Final Exam Review

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Biology
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Poriferans (sponges) lack true tissues and organs, while cnidarians (like jellyfish) have true tissues and exhibit radial symmetry.
2.
FLASHCARD QUESTION
Front
What type of symmetry do cnidarians exhibit?
Back
Cnidarians exhibit radial symmetry.
3.
FLASHCARD QUESTION
Front
What is a diurnal tide?
Back
A diurnal tide is a tidal pattern where there is one high tide and one low tide each day.
4.
FLASHCARD QUESTION
Front
Why do sea turtles leave the water?
Back
Sea turtles usually leave the water to lay eggs.
5.
FLASHCARD QUESTION
Front
What is the deepest oceanic trench?
Back
The Mariana Trench is the deepest oceanic trench.
6.
FLASHCARD QUESTION
Front
What are spring tides?
Back
Spring tides occur every two weeks during new and full moons, resulting in higher high tides and lower low tides.
7.
FLASHCARD QUESTION
Front
What is the significance of true tissues in cnidarians?
Back
True tissues allow cnidarians to have specialized functions and structures, unlike poriferans.
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