Ultimate Quiz On Ecdysozoa

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| By Reptilesrock
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  • 1/12 Questions

    Who adds minerals to increase what? (Example in lecture)

    • Crustacea add minerals to increase water proofing
    • Crustacea add minerals to increase hardness
    • Tardigrades add minerals to increase elasticity
    • Grasshoppers add alcohol to increase cocktails
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About This Quiz

Because I still don't want to revise MCI :D

Ultimate Quiz On Ecdysozoa - Quiz

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  • 2. 

    Small Ecdysozoa (such as tardigrades) are good at _____

    Explanation
    Small Ecdysozoa, such as tardigrades, are good at cryptobiosis. Cryptobiosis is a state of suspended animation in which an organism's metabolic activities are almost completely halted. Tardigrades are known for their ability to enter cryptobiosis in response to extreme environmental conditions, such as desiccation or extreme temperatures. During cryptobiosis, tardigrades can survive without water for long periods of time and withstand extreme temperatures, radiation, and even the vacuum of space. This unique adaptation allows them to survive in harsh environments and resume their normal activities once favorable conditions return.

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  • 3. 

    The cuticle is secreted by the ______

    Explanation
    The correct answer is epidermis. The epidermis is the outermost layer of cells in the skin of plants and animals. It is responsible for producing the cuticle, a waxy layer that covers the outer surface of the plant or animal and helps to prevent water loss and protect against pathogens. The ectodermis, on the other hand, is a layer of cells found in the roots of plants that functions in the absorption of water and minerals. Therefore, the correct answer is epidermis.

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  • 4. 

    Nematodes have low ____ diversity but very high _____ diversity.

    Explanation
    Nematodes have low morphological diversity but very high physiological diversity. This means that while they may have limited variation in their physical characteristics, such as body shape or size, they exhibit a wide range of physiological adaptations and functions. This diversity in physiological traits allows nematodes to occupy different ecological niches and adapt to various environmental conditions.

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  • 5. 

    DNA _____ _____ has been invaluable in establishing Ecdysozoa.

    Explanation
    DNA sequence data and sequencing data have been invaluable in establishing Ecdysozoa. This is because the DNA sequence data provides information about the specific sequence of nucleotides in the DNA of different organisms, allowing scientists to compare and analyze the genetic similarities and differences between species. Sequencing data refers to the process of determining the order of nucleotides in a DNA molecule. By analyzing the DNA sequence data and sequencing data, scientists can identify common genetic traits and relationships between different species, helping to establish the evolutionary relationships within the Ecdysozoa group.

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  • 6. 

    Insects and nematodes have lost original ____ and  ____ _____ new systems.

    Explanation
    Insects and nematodes have lost their original excretory systems and independently evolved new systems called nephridia. This means that both insects and nematodes have developed their own separate excretory systems, which are called nephridia.

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  • 7. 

    Cuticle properties can be changed by_____

    • Layers

    • Additives

    • Sun exposure

    • Water exposure

    Correct Answer
    A. Additives
    Explanation
    Additives can change the properties of the cuticle. Cuticles are the outermost layer of an organism, such as the protective layer on plants or the outer layer of skin. Additives are substances that are added to a material to enhance or modify its properties. In the context of cuticles, additives could refer to substances like oils, waxes, or chemicals that are applied to the cuticle to alter its texture, appearance, or protective capabilities. By adding these additives, the cuticle's properties can be modified, providing benefits such as increased moisture retention, UV protection, or improved resistance to environmental factors.

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  • 8. 

    The ecdysozoan cuticle is made of ____, a polymer of ___ ______ _______

    Correct Answer
    chitin N-acetylglucosamine
    Explanation
    The ecdysozoan cuticle is composed of chitin, which is a polymer made up of N-acetylglucosamine. Chitin is a tough, flexible substance that provides structural support and protection to the organisms possessing it. N-acetylglucosamine is a sugar molecule that forms the building blocks of chitin. Together, these components form the ecdysozoan cuticle, serving as a protective outer covering for various organisms within the ecdysozoan group.

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  • 9. 

    Check all phylums included in Ecdysozoa:

    • Chelicerates

    • Nematoda

    • Onychophora

    • Tardigrada

    • Cestodes

    • Annelida

    • Arthropoda

    • Coeloids

    • Nematomorphs

    • Liapulids

    • Priapulids

    • Kinorhynchs

    Correct Answer(s)
    A. Nematoda
    A. Onychophora
    A. Tardigrada
    A. Arthropoda
    A. Nematomorphs
    A. Priapulids
    A. Kinorhynchs
    Explanation
    The correct answer includes the phylums Nematoda, Onychophora, Tardigrada, Arthropoda, Nematomorphs, Priapulids, and Kinorhynchs. These phylums are all part of the Ecdysozoa group, which is characterized by organisms that undergo ecdysis or molting.

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  • 10. 

    Which phylum shows coelomate ancestry most clearly?

    • Arthropoda

    • Nematoda

    • Onychophora

    • Tardigrada

    • Nematomorpha

    Correct Answer
    A. Onychophora
    Explanation
    Onychophora is the correct answer because it is a phylum that exhibits clear evidence of coelomate ancestry. Coelomates are organisms that have a true body cavity called a coelom, which is lined with mesoderm. Onychophora possess a well-developed coelom, which is a characteristic feature of coelomate organisms. This phylum also shares other characteristics with coelomates, such as a complete digestive system and a closed circulatory system. Therefore, Onychophora is the phylum that most clearly demonstrates coelomate ancestry.

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  • 11. 

    What are the main characteristics of Ecdysozoa?

    • External cilia

    • Ciliated larval forms

    • No ciliated larval forms

    • No external cilia

    • Cuticle

    • Coelom

    • Reduced coelom/haemocoel

    • Moulting

    Correct Answer(s)
    A. No ciliated larval forms
    A. No external cilia
    A. Cuticle
    A. Reduced coelom/haemocoel
    A. Moulting
    Explanation
    Ecdysozoa is a group of animals that share several main characteristics. Firstly, they do not have ciliated larval forms, meaning that their larvae do not possess cilia for movement. Additionally, they also lack external cilia in their adult forms. Another characteristic is the presence of a cuticle, which is a protective outer covering made of a tough, flexible material. Ecdysozoa also have a reduced coelom or haemocoel, which refers to the body cavity. Lastly, these animals undergo moulting, a process where they shed their old cuticle and grow a new one.

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  • 12. 

    How many phylums are in Ecdysozoa?

    • 1

    • 2

    • 3

    • 4

    • 5

    • 6

    • 7

    • 8

    Correct Answer
    A. 7
    Explanation
    The correct answer is 7. The phylum is a taxonomic rank in the classification of organisms. Ecdysozoa is a superphylum that includes various groups of invertebrates, such as arthropods and nematodes. Within the Ecdysozoa superphylum, there are seven recognized phyla: Nematoda, Tardigrada, Onychophora, Priapulida, Kinorhyncha, Loricifera, and Arthropoda. Each phylum represents a distinct group of organisms with certain characteristics and evolutionary relationships.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Apr 30, 2011
    Quiz Created by
    Reptilesrock
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