12 Questions
Which organisms are known as the architects of the ocean floor in the phylum Cnidaria?
Horny corals
What is the characteristic cell of the phylum Cnidaria?
Cnidocytes
Which group of organisms also utilize stinging structures for their own defense, similar to cnidarians?
All of the above
What is the total number of species in the phylum Cnidaria?
Over 9000
What are the two types of corals mentioned in the text?
horny corals and stony corals
What is the significance of cnidocytes in the phylum Cnidaria?
Cnidocytes are characteristic cells that contain stinging organelles (cnidae) unique to the phylum Cnidaria.
Which organisms eat hydroids bearing nematocysts and use the stinging structures for their own defense?
Some ctenophores, molluscs, and flatworms
What are the nature’s strangest and loveliest creatures mentioned in the text?
Branching, plantlike hydroids; flowerlike sea anemones; jellyfishes
True or false: Cnidaria includes only jellyfishes and corals, and no other types of creatures
False
True or false: Cnidocytes are formed by cnidarians, ctenophores, molluscs, and flatworms
False
True or false: Cnidaria is not named after the characteristic cells called cnidocytes
False
True or false: The calcareous house-building of stony corals has produced great reefs and coral islands over hundreds of years
True
Explore the fascinating world of Phylum Cnidaria, which includes diverse species like hydroids, sea anemones, jellyfish, and corals. Learn about their unique characteristics and ecological significance.
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