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Coral Seas

Created by pshelton

Fun Trivia : Quizzes : Cnidarians (Corals, Hydras, Etc.)
Coral Seas game quiz
"Corals are some of the largest living organisms on earth and were recently featured on "Blue Planet". Take an opportunity to learn about these remarkable creatures."

15 Points Per Correct Answer - No time limit  



1. It is well-known that corals are marine animals where the large reef-forming organism is comprised of many small individual "unit" animals. What are these coral units called?
    coralites
    polyps
    zygotes
    shales


2. What is the primary food source for most corals?
    plankton
    microscopic algae
    other coral
    starfish


3. How do corals reproduce?
    Corals do not reproduce
    They only reproduce asexually
    Both sexual and asexual reproduction
    When old coral dies, it emits a seed that will form a new coral


4. Which of the following is NOT a dependency that marine animals may have on coral reefs?
    Venue for reproductive activities
    Use as a habitat
    All of these are dependencies that marine animals may have on coral reefs
    Source of food


5. Which of the following feed on the coral algae but are so violent that they can destroy up to 5 tons of coral per year?
    parrot fish
    moray eels
    basket starfish
    lionfish


6. A polyp's exoskeleton can grow up to nearly 1 foot in a year.
    True
    False


7. Periodically, algae can be ejected from the coral in a process known as coral bleaching. What is the primary reason for this ejection?
    Stress on the polyps.
    The algae becomes too heavy for the coral to support
    This is part of a natural cycle that occurs every 6 months
    The coral is getting ready to die


8. Which of the following is NOT a contributing factor in coral bleaching?
    Ocean temperature
    Increase acidity of the ocean
    Overfishing of an area
    Age of the coral


9. Crown of thorns starfish feeds on the coral polyps. Which of the following is a deterrent to this destruction of the coral?
    The coral releases an enzyme which the crown of thorns dislikes
    The calcyx completely protects the polyps
    The polyps sting the starfish
    Small crabs living in the coral will fight the starfish


10. What happens if one coral comes into contact with another during growth?
    They will merge to form a new larger coral
    It will trigger an immediate reproductive process
    As one approaches, both corals emit enzymes to cause the other to withdraw to a safe distance
    The two corals will battle violently over the encroachment


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Compiled May 23 13