Phylums Quiz: Annelids, Sipunculans, And Echiura

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Phylums Quiz: Annelids, Sipunculans, And Echiura - Quiz

This quiz is based on the characteristics in the powerpoint of the different phylums and classes.


Questions and Answers
  • 1. 

    Which system to Sipuncula NOT have?

    • A.

      Digestive system

    • B.

      Circulatory system

    • C.

      Nervous system

    Correct Answer
    B. Circulatory system
    Explanation
    Sipuncula, also known as peanut worms, do not have a circulatory system. While they have a digestive system and a nervous system, they lack a specialized circulatory system for the transportation of nutrients and gases throughout their body. Instead, they rely on diffusion to exchange these substances with their environment.

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  • 2. 

     Which is referred to as the Peanut Worm?

    • A.

      Sipuncula

    • B.

      Annelida

    • C.

      Echiura

    Correct Answer
    A. Sipuncula
    Explanation
    Sipuncula is referred to as the Peanut Worm.

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  • 3. 

    The Sipunculans are segmented.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement that the Sipunculans are segmented is false. Sipunculans are actually unsegmented marine worms. They have a soft, elongated body that lacks any visible segments. This characteristic distinguishes them from other segmented worms such as annelids. Instead of having distinct segments, Sipunculans have a fluid-filled body cavity called a coelom that helps with movement and digestion.

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  • 4. 

    The Annelids have chaetae while the Sipunculans do not.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Annelids, such as earthworms, have chaetae which are bristle-like structures that aid in locomotion and provide support. Sipunculans, on the other hand, do not possess chaetae. Therefore, the statement that Annelids have chaetae while Sipunculans do not is true.

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  • 5. 

    How many classes are in the phyla Annelida?

    • A.

      5

    • B.

      3

    • C.

      2

    Correct Answer
    B. 3
    Explanation
    Annelida is a phylum that includes segmented worms. There are three main classes within the phylum Annelida: Polychaeta, Oligochaeta, and Hirudinea. Polychaeta includes marine worms with bristles called setae, Oligochaeta includes earthworms and freshwater worms, and Hirudinea includes leeches. Therefore, the correct answer is 3, as there are three classes in the phylum Annelida.

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  • 6. 

    What is an example of an Annelid?

    • A.

      Earthworm

    • B.

      Butterfly

    • C.

      Flatworm

    Correct Answer
    A. Earthworm
    Explanation
    An example of an Annelid is an earthworm. Annelids are a phylum of segmented worms that includes earthworms, leeches, and polychaetes. Earthworms have a segmented body with a distinct head and tail, and they are known for their role in soil fertility and decomposition. They have a closed circulatory system and are hermaphroditic, meaning they have both male and female reproductive organs. Earthworms are commonly found in gardens and play a crucial role in maintaining soil health.

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  • 7. 

    What are the Echiura referred to as:

    • A.

      Fork Worms

    • B.

      Spoon Worms

    • C.

      Tall Worms

    Correct Answer
    B. Spoon Worms
    Explanation
    Echiura are referred to as Spoon Worms because of their unique shape resembling a spoon. These marine worms have a long, cylindrical body with a spoon-shaped proboscis that they use for feeding and burrowing in the sediment. The name "Spoon Worms" accurately describes their physical appearance and distinguishes them from other types of worms.

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  • 8. 

    Echiura have:

    • A.

      No symmetry

    • B.

      Bilateral symmetry

    • C.

      Radial symmetry

    Correct Answer
    B. Bilateral symmetry
    Explanation
    Echiura have bilateral symmetry, meaning that their bodies can be divided into two equal halves along a central axis. This allows for efficient movement and coordination, as their body parts are organized in a balanced manner. Unlike organisms with radial symmetry, such as jellyfish, echiura have distinct front and back ends, as well as a clear left and right side. This symmetry is advantageous for echiura as it enables them to navigate their environment and interact with other organisms in a more controlled and precise manner.

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  • 9. 

    Leeches belong to the Class:

    • A.

      Polychaeta

    • B.

      Oligochaeta

    • C.

      Hirudinea

    Correct Answer
    C. Hirudinea
    Explanation
    Leeches belong to the Class Hirudinea. This class is a subclass of annelids, which are segmented worms. Hirudinea is characterized by their flattened bodies, suckers at both ends, and the ability to secrete anticoagulants. They are primarily freshwater organisms, although some species can also be found in marine and terrestrial environments. Leeches are well-known for their blood-feeding behavior and have been used in medical practices such as bloodletting and modern medicine for their anticoagulant properties.

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  • 10. 

    All organisms in the class Hirudinea are parasitic.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement is false because not all organisms in the class Hirudinea are parasitic. While many leeches, which belong to the class Hirudinea, are indeed parasitic, there are also non-parasitic species within this class. Some non-parasitic leeches are predators and feed on other invertebrates, while others are scavengers that feed on decaying organic matter. Therefore, it is incorrect to claim that all organisms in the class Hirudinea are parasitic.

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  • 11. 

    Which of these have a U-shaped digestive tract?

    • A.

      Annelida

    • B.

      Sipunculans

    • C.

      Echiura

    Correct Answer
    B. Sipunculans
    Explanation
    Sipunculans have a U-shaped digestive tract. This means that their digestive system forms a U-shape, with the mouth and anus located close to each other. This type of digestive tract allows for efficient digestion and absorption of nutrients. Annelida and Echiura do not have a U-shaped digestive tract, therefore they are not the correct answer.

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  • 12. 

    Which of these have the highest developed and advanced of the worm-like invertebrates in their category?

    • A.

      Annelida

    • B.

      Sipunculan

    • C.

      Echiura

    Correct Answer
    A. Annelida
    Explanation
    Annelida have the highest developed and advanced of the worm-like invertebrates in their category. This is because Annelida, also known as segmented worms, have a well-developed body structure with distinct segments and specialized organs. They also have a closed circulatory system and a true coelom, which allows for more efficient movement and organ function. Additionally, Annelida includes various diverse species such as earthworms, leeches, and polychaetes, which exhibit a wide range of adaptations and ecological roles.

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  • 13. 

    Does the Class Polychaeta have sexual or asexual reproduction?

    • A.

      Sexual

    • B.

      Asexual

    Correct Answer
    A. Sexual
    Explanation
    The class Polychaeta exhibits sexual reproduction. This means that individuals of this class reproduce by the fusion of gametes from two parents, resulting in the formation of offspring with genetic variation. In sexual reproduction, the male and female gametes combine through fertilization to form a zygote, which develops into a new individual. This process allows for genetic diversity and adaptation to changing environments.

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  • 14. 

    Which has a Clitellum as an adult?

    • A.

      Leech

    • B.

      Earthworm

    • C.

      Spider

    Correct Answer
    B. Earthworm
    Explanation
    An earthworm has a clitellum as an adult. The clitellum is a thickened band of segments that secretes a mucous cocoon during reproduction. This cocoon protects the eggs and sperm as they are deposited and allows for external fertilization. Leeches and spiders do not have a clitellum as adults.

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  • 15. 

    How many segments is the body split in to in the Class Hirudinea?

    • A.

      2

    • B.

      9

    • C.

      5

    Correct Answer
    C. 5
    Explanation
    The body of a leech, which belongs to the Class Hirudinea, is split into five segments. Each segment serves a specific function and contributes to the overall structure and movement of the leech. This segmentation allows for flexibility and coordination in the leech's body, enabling it to navigate and adapt to its environment effectively.

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  • 16. 

    Sipunculans are what type of feeder?

    • A.

      Detritus

    • B.

      Autotrophic

    • C.

      Photosynthetic

    Correct Answer
    A. Detritus
    Explanation
    Sipunculans are detritus feeders because they primarily consume organic matter and debris found in sediment. They obtain nutrients by ingesting and digesting decaying plant and animal material, as well as particles suspended in the water column. This feeding strategy allows them to play an important role in nutrient cycling and decomposition processes in marine ecosystems.

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  • 17. 

    The introvert in the Phylum Sipunculans cannot evert and retract.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement is false because introverts in the Phylum Sipunculans can actually evert and retract. Introverts are specialized structures found in sipunculans that can be extended outwards or retracted back into the body. This ability allows them to capture prey, protect themselves, and aid in locomotion. Therefore, the correct answer is false.

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  • 18. 

    Echiura usually have external fertilization.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Echiura, also known as spoon worms, typically reproduce through external fertilization. This means that the eggs and sperm are released into the water where fertilization occurs. This method of reproduction is common among many marine organisms, allowing for increased chances of successful fertilization and genetic diversity. Therefore, the statement that Echiura usually have external fertilization is true.

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  • Current Version
  • Mar 15, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 28, 2009
    Quiz Created by
    Amf
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