15 Questions
Which phylum has adults that are endoparasites of vertebrates and juveniles in arthropods?
Acanthocephala (Spiny-Headed Worms)
Which phylum is triploblastic with true coelom and usually has a soft, unsegmented body?
Phylum Mollusca (Molluscs)
Which organism has a cylindrical retractable proboscis with rows of spines?
Acanthocephala (Spiny-Headed Worms)
Which phylum has a body usually enclosed by a thin fleshy mantle that secretes hard external shell?
Phylum Mollusca (Molluscs)
Which phylum has adults with no digestive tract and a long cylindrical body with spiny proboscis?
Acanthocephala (Spiny-Headed Worms)
Spiny-Headed Worms belong to the Phylum Acanthocephala
True
The Phylum Mollusca is triploblastic with true coelom
True
The Phylum Mollusca has a body usually enclosed by a thin fleshy mantle
True
Acanthocephala has a digestive tract
False
Gastrotricha and Nematomorpha are endoparasites of vertebrates
False
Spiny-Headed Worms belong to the Phylum Mollusca
False
Acanthocephala has a digestive tract
False
Phylum Mollusca has bilateral symmetry and some with secondary asymmetry
True
Gastrotricha and Nematomorpha are endoparasites of vertebrates
True
Acanthocephala has a cylindrical retractable proboscis with rows of spines
True
Study Notes
Phylum Characteristics
- The phylum with adults that are endoparasites of vertebrates and juveniles in arthropods is unknown (not mentioned in the text).
- Phylum Mollusca is triploblastic with a true coelom.
- Phylum Mollusca has a body usually enclosed by a thin fleshy mantle that secretes a hard external shell.
Phylum Acanthocephala
- Also known as Spiny-Headed Worms.
- Has a cylindrical retractable proboscis with rows of spines.
- Adults have no digestive tract.
- Body is long and cylindrical.
Phylum Mollusca
- Body has bilateral symmetry, and some have secondary asymmetry.
Other Phyla
- Gastrotricha and Nematomorpha are endoparasites of vertebrates.
- Note: They are not part of the Phylum Acanthocephala or Mollusca.
Test your knowledge of invertebrate diversity with this quiz covering topics such as Acanthocephala, Gastrotricha, Nematomorpha, and Phylum Mollusca. Evaluate your understanding of the characteristics of these organisms and their body cavities.
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