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    4. Phylum Hemichordata MCQ - Practice Questions with Answers

    Phylum Hemichordata MCQ - Practice Questions with Answers

    Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

    Quick Facts

    • 17 Questions around this concept.

    Solve by difficulty

    QuestionEASY

    Which of the following structures of hemichordates was previously confused with notochord?

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    The heart in hemichordata is 

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    Members of Hemichordata are?

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    Concepts Covered - 1

    Phylum Hemichordata - Characteristics Features
    • These are marine worm-like animals. 
    • They bear a resemblance to the chordates in having pharyngeal gill slits. 
    • They also bear a resemblance to the phylum Echinodermata. 
    • They show the following characteristic features:
    • They have an unsegmented body with organ system level of body organization
    • They are triploblastic, coelomate and bilaterally symmetrical
    • The body is divided into three parts as: proboscis, collar and trunk
    • The proboscis has a buccal diverticulum or stomochord. It was earlier considered as notochord.
    • They have an open type of circulatory system
    • Gills are used for respiration
    • Proboscis gland is the excretory organ
    • They are dioecious. Fertilization occurs externally and development is indirect
    • These are commonly known as Acorn worms or Tongue worms due to shape of proboscis
    • Examples: Balanoglossus, Saccoglossus
                                           

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    Phylum Hemichordata - Characteristics Features

    Study other Related Concepts

    Phylum Hemichordata Current Topic

    Concept of Living and Need for Classification
    Taxonomy and Taxonomical Aids
    Steps of Taxonomy
    Vernacular and Scientific Names
    Binomial Nomenclature
    Taxonomic Hierarchy In Biological Classification
    Taxonomical Aids
    Classification Systems
    Three domains of life
    History of Classification of Organisms

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