7th Grade Sponges, Cnidarians

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| By Dsullivan
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Dsullivan
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Quizzes Created: 2 | Total Attempts: 1,676
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  • 1/10 Questions

    Colony means..

    • A gruop of individual animals
    • A state and or city
    • A large amount of condensed material
    • A sinking material
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About This Quiz

Sponges and Cnidarians are both invertebrates but belong to a different class of organisms. Sponges lack symmetry whereas cnidarians have radial symmetry. What more can you tell about these aquatic species? Take up the simple quiz below and jog your memory on these two sets of invertebrates. All the best!

7th Grade Sponges, Cnidarians - Quiz

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  • 2. 

    The word larva's defintion is....

    • A newly born egg that is prettier than mother

    • An immature form of an animal

    • A group of little cells

    Correct Answer
    A. An immature form of an animal
    Explanation
    The correct answer is "an immature form of an animal." A larva is a developmental stage in the life cycle of many animals, including insects, amphibians, and some fish. It is characterized by its distinct morphology and physiology, which are different from the adult form. Larvae undergo metamorphosis to transform into their adult form. This answer accurately describes the definition of a larva as an immature stage in the life cycle of an animal.

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  • 3. 

    True or False?Sponges are filter feeders and absorb oxygen in dissolved water.Filter feeders are small organisms in water

    • True

    • False

    • Don't know

    Correct Answer
    A. True
    Explanation
    Sponges are indeed filter feeders, meaning they obtain their food by filtering water and extracting nutrients from it. They have specialized cells called choanocytes that create water currents and capture small particles, including bacteria and organic matter, for consumption. Additionally, sponges do absorb oxygen from the water through their cells, as they lack specialized respiratory organs. Therefore, the statement "Sponges are filter feeders and absorb oxygen in dissolved water" is true.

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  • 4. 

    Cnidarians are

    • A series or dormat species that live in species

    • A species of non moving sponges

    • Organisms that take in food through a cavity anh have stinging cells

    • None of the above

    • All of the above, but D

    Correct Answer
    A. Organisms that take in food through a cavity anh have stinging cells
    Explanation
    Cnidarians are organisms that take in food through a cavity and have stinging cells. Cnidarians include jellyfish, sea anemones, and coral. They have a central body cavity called a gastrovascular cavity, which serves both as a digestive chamber and a means of distributing nutrients throughout the body. Cnidarians also possess specialized cells called cnidocytes, which contain stinging structures called nematocysts. These stinging cells are used for defense and capturing prey. Therefore, the correct answer is organisms that take in food through a cavity and have stinging cells.

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  • 5. 

    Poly defintion is..... and  medusa defintion is...

    • Vase shaped body plan...Worm shaped body plan

    • Worm shaped body plan...head shaped body plan

    • Vase shaped body plan......bowl shaped body plan

    • None of the above

    Correct Answer
    A. Vase shaped body plan......bowl shaped body plan
    Explanation
    The correct answer is "Vase shaped body plan......bowl shaped body plan." This means that the poly definition refers to a vase-shaped body plan, while the medusa definition refers to a bowl-shaped body plan.

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  • 6. 

    True or False...if false what are the correctionsLife Cycle of sponges is they can reproduce sexually or asexuallythe eggs hatch into larva and grow into adults

    • True

    • False

    • False......no larva

    Correct Answer
    A. True
    Explanation
    The statement is true. The life cycle of sponges involves both sexual and asexual reproduction. The eggs hatch into larvae, which then develop into adult sponges.

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  • 7. 

    TRue or False?The structure of sponges is:No symmetry, opening at two ends. hollow nag, collar cells, neutral cells, jelly-like cells, tiny pores that cover surfaceIf incorrect how many errors are in above sentence

    Correct Answer
    False, 3
    Explanation
    The given sentence describes the structure of sponges as having no symmetry, an opening at two ends, a hollow nag, collar cells, neutral cells, jelly-like cells, and tiny pores that cover the surface. However, this description is incorrect. The correct structure of sponges includes asymmetry, an opening at one end, a central cavity, collar cells, and tiny pores called ostia that cover the surface. Therefore, there are three errors in the given sentence.

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  • 8. 

    Coral Reef definition is.....

    • A home built by cnidarians

    • A valley of dormat sponges

    • A hollow rock that is eroded by water

    Correct Answer
    A. A valley of dormat sponges
  • 9. 

    List Sponge adaptations

    Correct Answer
    1.Spike cells for structure and protection
    Explanation
    The given answer states that sponge adaptations include spike cells for structure and protection. This means that sponges have developed specialized cells with spiky structures that serve the purpose of providing support and protection to the sponge. These spike cells help maintain the shape and structure of the sponge, as well as deter predators from feeding on them. By having spike cells, sponges are able to thrive in their aquatic environments and survive various challenges they may face.

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  • 10. 

    Cnidarians get food byusing their __________ and then _______prey.  The__________pull pray until thread like stucture explodes out. This may release venom

    Correct Answer
    a. stinging cells b.sting c.tentacles
    Explanation
    Cnidarians get food by using their stinging cells to sting prey. The tentacles pull prey until a thread-like structure explodes out, which may release venom.

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  • Dec 02, 2024
    Quiz Edited by
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  • Mar 08, 2010
    Quiz Created by
    Dsullivan
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