35 Questions
What is the class of animals within phylum Cnidaria that includes sea pens, sea daisies, and corals?
Anthozoa
Which class of animals has individuals with a sting toxic enough to kill humans?
Cubozoa
What is the form of cnidarians that is free-swimming and umbrella-shaped?
Medusa
What characteristic assists a typical cnidarian in defense and prey capture?
Nematocysts
How many clades make up the Bilateria group of animals?
Two
In which form of cnidarians is the mouth surrounded by tentacles?
Polyp
What is the unique stinging intracellular structure found in cnidarians?
Nematocysts
Which body form of a cnidarian is characterized by a cylindrical body with tentacles around its mouth?
Polyp
What is the free-swimming, umbrella-shaped form of a cnidarian called?
Medusa
Which class of cnidarians includes sea anemones and sea pens?
Anthozoa
What is the main function of nematocysts in cnidarians?
Defense and prey capture
Which clade includes animals with true tissues and body symmetry?
Eumetazoa
What is the term for the free-swimming form of cnidarians that is umbrella-shaped with a mouth on the concave underside?
Medusa
Which phyla belong to the Deuterostomes group?
Echinoderms, Chordates
What are the two major clades of protostomes?
Ecdysozoa, Annelida
What is a characteristic of cnidarians?
Radial symmetry
What are the advantages of having a body cavity in animals?
Cushioning internal organs
What term is used for members of phylum Ctenophora?
Comb jellies
Which phylum is characterized by having species with a primitive nervous system and lacking a digestive cavity?
Platyhelminthes
In the context of Bilaterian classification, which group is traditionally classified based on the condition of their coelom?
Bryozoa
What clade is characterized by members with true tissues and body symmetry?
Bryozoa
Among the following options, which one is a part of the Protostomes group based on molecular evidence?
Platyzoa
Which group is characterized by bilateral symmetry, allowing for high levels of specialization?
Acoelomates
Which of the following phyla is characterized by having a flattened body and no body cavity?
Platyhelminthes
Bryozoans, also known as moss animals, are members of which major animal group?
Protostomes
Which of the following is a key characteristic of the Cnidaria phylum?
Possession of nematocysts (stinging cells)
Which of the following is a major clade of the Protostomes?
Spiralia
Which phylum is considered to be the most basal, or primitive, bilaterian animals?
Acoelomorpha
Which of the following is a characteristic of Cnidarians?
Radial symmetry
Which of the following is a characteristic of Platyhelminthes?
They are acoelomates
What is the distinguishing feature of Bryozoa?
They form colonies with a net-like pattern
Which of the following is a characteristic of Cnidaria?
They possess nematocysts
Which of the following is a characteristic of Protostomes?
They develop the mouth first from the blastopore
What is a distinguishing feature of Acoelomorpha?
They lack a body cavity and digestive system
Which of the following is a characteristic of Deuterostomes?
They develop the anus first from the blastopore
Test your knowledge of animal classification and characteristics with this quiz! Learn about phylum Cnidaria, class Anthozoa, bilateral symmetry, and more.
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