Phylum Ctenophora Class Tentaculata

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| By Colleennicole
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  • 1/8 Questions

    Tentaculatas are bio-luminescent. 

    • True
    • False
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Phylum Ctenophora Class Tentaculata - Quiz
About This Quiz

Explore the unique features of the Phylum Ctenophora, Class Tentaculata, through this quiz. Assess your knowledge on their structure, such as statocysts and comb rows, and biological characteristics including bioluminescence and predation methods. Ideal for learners interested in marine biology and invertebrate zoology.

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  • 2. 

    In Ctenophores, what are used to swim?

    • Tentacles

    • Statocysts

    • Comb plates

    Correct Answer
    A. Comb plates
    Explanation
    Ctenophores, also known as comb jellies, use comb plates to swim. Comb plates are rows of cilia that are arranged in bands along their body. These cilia beat in a coordinated manner, creating a wave-like motion that propels the ctenophore through the water. This unique method of locomotion allows ctenophores to move gracefully and efficiently in their marine environments.

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  • 3. 

    Ctenophores have alternation of generations. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Ctenophores, also known as comb jellies, do indeed exhibit alternation of generations. This means that they have a life cycle that includes both a sexual reproductive phase and an asexual reproductive phase. In the sexual phase, ctenophores reproduce by producing eggs and sperm, which then combine to form a zygote. This zygote develops into a larval stage, which eventually grows into an adult ctenophore. In the asexual phase, ctenophores can reproduce by budding, where a small piece of the adult ctenophore breaks off and develops into a new individual. Therefore, the statement that ctenophores have alternation of generations is true.

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  • 4. 

    ___________ is an equillibrium structure Ctenophora possess on their aboral end. 

    Correct Answer
    Statocysts
    Explanation
    Statocysts are equilibrium structures found on the aboral end of Ctenophora. These structures help Ctenophora maintain their balance and orientation in the water. They contain tiny sensory hairs and a small mineralized mass called a statolith. When the animal moves or changes its position, the statolith moves and stimulates the sensory hairs, providing information about its orientation in relation to gravity. This allows Ctenophora to adjust their movements and stay upright in the water column.

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  • 5. 

    Ctenophores posess eight bands called _____ ____ composed of long, fused ______.

    Correct Answer
    comb rows, cilia
    Explanation
    Ctenophores have eight bands known as comb rows, which are made up of long, fused cilia. These comb rows are responsible for the unique locomotion of ctenophores, as the synchronized beating of the cilia allows them to move through the water. The cilia in the comb rows create a comb-like appearance and help propel the ctenophores forward.

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  • 6. 

    Ctenophores possess epidermis, __________, and also _________ which is a gelatinous layer sandwiched in between that contains __________ cells. 

    Correct Answer
    gastrodermis, collenchyme, ameboid
    Explanation
    Ctenophores possess an outer layer called the epidermis, an inner layer called the gastrodermis, and a gelatinous layer called collenchyme sandwiched in between. The collenchyme layer contains ameboid cells.

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  • 7. 

    Ctenophores do not possess ________, instead they have _____ on their tentacles to catch prey. 

    Correct Answer
    nematocysts, mucous
    Explanation
    Ctenophores do not possess nematocysts, which are specialized stinging cells found in cnidarians like jellyfish. Instead, they have mucous on their tentacles to catch prey. Mucous helps in trapping and immobilizing small organisms that come into contact with the ctenophore's tentacles, allowing them to be easily consumed.

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  • 8. 

    Ctenophores are first to have a ________ and ___ ____ .

    Correct Answer
    stomach, anal canals
    Explanation
    Ctenophores are the first organisms to have a stomach and anal canals. This means that they have a specialized digestive system that includes a stomach for breaking down food and anal canals for eliminating waste. Having these structures indicates a higher level of complexity in their digestive processes compared to other organisms.

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  • Mar 19, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 29, 2010
    Quiz Created by
    Colleennicole
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