ECHINODERMATA

    Cards (76)

    • What is the Greek origin of the term Echinodermata?

      It comes from "echinos" meaning sea hedgehog and "derma" meaning skin.
    • What distinguishes echinoderms from all other members of the animal kingdom?
      Echinoderms are characterized by their spiny skin and calcareous endoskeleton.
    • What type of skeleton do echinoderms possess?

      They possess a calcareous endoskeleton.
    • What are the objectives of studying Phylum Echinodermata?

      1. State the distinguishing characteristics of echinoderms.
      2. Identify the classes under Phylum Echinodermata.
      3. Characterize the representative forms of each class.
    • Name a representative echinoderm from the class Asteroidea.

      Asterias rubens
    • What class does Ophiothrix fragilis belong to?

      Asteroidea
    • What is the representative echinoderm from the class Holothuroidea?

      Holothuria scabra
    • Which class does Strongylocentrorus purpuratus belong to?
      Echinoidea
    • What is the representative echinoderm from the class Crinoidea?

      Metacinus rotundus
    • What are the peculiar characteristics that distinguish echinoderms from all other animals?
      Echinoderms have radial symmetry, a water vascular system, and can regenerate lost body parts.
    • What is autotomy in echinoderms?

      Autotomy is a defensive mechanism where an animal intentionally sheds a body part to escape predators.
    • How does regeneration differ from autotomy?

      Regeneration is the process of regrowing lost body parts, while autotomy is the shedding of body parts for defense.
    • Why are echinoderms considered more advanced than previously discussed phyla?
      They have a specialized water vascular system, an internal calcareous endoskeleton, and advanced regenerative abilities.
    • What role does the water vascular system play in echinoderms?

      It powers their tube feet for movement and feeding.
    • What is the significance of the calcareous endoskeleton in echinoderms?

      It provides structural support and protection.
    • How do echinoderms demonstrate ecological success compared to simpler animal phyla?

      Through their evolutionary adaptations to various marine environments.
    • What type of environment do echinoderms exclusively inhabit?

      Marine environments
    • How do the larvae of echinoderms differ from the adults?

      Larvae are bilaterally symmetrical, while adults are radially symmetrical
    • What type of body structure do echinoderms possess?
      Unsegmented and triploblastic
    • What is the origin of the water vascular system in echinoderms?

      It is of coelomic origin
    • How developed is the circulatory system in echinoderms?

      It is reduced
    • How developed is the sensory system in echinoderms?

      It is poorly developed
    • Which organ systems in echinoderms are well developed?
      All other organ systems except the circulatory and sensory systems
    • What is the reproductive strategy of the majority of echinoderms?

      They are monoecious
    • What type of fertilization do echinoderms usually undergo?

      External fertilization
    • What does the development of echinoderms include?

      Metamorphosis through a specialized free-swimming larval stage
    • What ability is widespread among echinoderms?
      The ability to regenerate lost parts
    • How do echinoderms typically move?

      They are usually slow-moving
    • What are some representative forms of echinoderms and their classes?
      • Sea stars: Archaster, Linckia (Class Asteroidea)
      • Brittle stars: Ophiura, Gorgonocephalus (Class Ophiuroidea)
      • Sea urchins: Tripneustes, Echinometra (Class Echinoidea)
      • Sea cucumbers: Holothuria, Synapta (Class Holothuroidea)
      • Sea lilies: Antedon, Lampometra (Class Crinoidea)
    • What does the term "Asteroidea" refer to in echinoderms?

      It refers to the class that includes sea stars
    • What does the term "Ophiuroidea" refer to in echinoderms?

      It refers to the class that includes brittle stars
    • What does the term "Echinoidea" refer to in echinoderms?

      It refers to the class that includes sea urchins
    • What does the term "Holothuroidea" refer to in echinoderms?

      It refers to the class that includes sea cucumbers
    • What does the term "Crinoidea" refer to in echinoderms?

      It refers to the class that includes sea lilies
    • What are the unique features of Phylum Chordata?

      Notochord, paired pharyngeal slits, and dorsal tubular nervous system
    • What does the term 'notochord' refer to in Chordata?

      A flexible rod that provides support
    • How do the embryonic features of chordates change in adults?

      They may persist, change, or disappear
    • What type of symmetry do chordates exhibit?

      Bilateral symmetry
    • What does 'triploblastic' mean in the context of chordates?

      Having three germ layers: ectoderm, mesoderm, and endoderm
    • What type of body cavity do chordates possess?

      True coelom
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