Biology 2e
Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
bartleby

Videos

Textbook Question
Book Icon
Chapter 28, Problem 1VCQ

Figure 28.3 Which of the following statements is

false?

  1. Choanocytes have flagella that propel water through the body.

  • Pinacocytes can transform into any cell type.
  • Lophocytes secrete collagen.
  • Porocytes control the flow of water through pores in the sponge body.
  • Chapter 28, Problem 1VCQ, Figure 28.3 Which of the following statements is false? Choanocytes have flagella that propel water

    Expert Solution & Answer
    Check Mark
    Summary Introduction

    Introduction:

    Generally, sponges do not show true tissue-layer organization and do not have a number of functional tissues, that made up of different cell types specialized for distinct functions such as pinacocytes Pinacocytes is epithelial-like cells and form the outermost body, called a pinacoderm, that serves a protective function similar to the epidermis. Pinacoderm scattered among all area of Ostia that allow entry of water into the body of the sponge.

    Answer to Problem 1VCQ

    Correct answer:

    Correct answer is option (b), Pinacocytes can transform into any cell type.

    Explanation of Solution

    Explanation/justification for the correct answer:

    Option (b) is given as Pinacocytes can transform into any cell type. Pinacoderm scattered among all area of ostia that allow entry of water into the body of the sponge. In some sponges, ostia are made up of porocytes, these single tube-shaped cells act as valves to regulate the flow of water into the spongocoel. It is a correct answer.

    Explanation for the incorrect answer:

    Option (a) is given as choanocytes have flagella that propel water through the body. Choanocytes line is the inner portions of spaces in the sponges that allow the flow of water. The water current is maintained through the presence of flagella so that food particles can be trapped and ingested via phagocytosis. It is a wrong answer.

    Option (c) is given as lymphocytes secret collagen. Lophocytes is a specific type of cells in sponges that able to produce protein like collagen for maintenance of mesophyll. it is a wrong answer.

    Option (d) is given as porocytes control the flow of the water through pores in the sponge. Porifera is a phylum that cover sponges that pore-bearers, in some sponges, porocytes make ostia like single tube-shaped cells that act as valves and help to regulate the flow of water into the spongocoel. it is a wrong answer.

    Conclusion

    Thus, Pinacocytes can transform into any cell type is a false statement.

    Want to see more full solutions like this?

    Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
    Students have asked these similar questions
    Oligochaetes have     well-developed heads     chaetae for locomotion     lungs for respiration     a muscular foot     a radula Which one of the following animals has an open circulatory system?     squid     earthworm     mussel     octopus     polychaete please help with these two questions
    Which specialized structure is not correctly paired with its actual function? gullet—ingestion cilia—food gathering contractile vacuole—digestion cilia—locomotion micronucleus—sexual reproduction
    Alternate contractions of ______________muscles bend the body of a cephalochordate, propelling it through the water column. Group of answer choices longitudinal   longitudinal and circular   notochordal circular transverse

    Chapter 28 Solutions

    Biology 2e

    Ch. 28 - The rhynchocoel is a. circulatory system...Ch. 28 - Annelids have (a): pseudocoelom true coelom no...Ch. 28 - A mantle and mantle cavity are present in: phylum...Ch. 28 - How does segmentation enhance annelid locomotion?...Ch. 28 - The embryonic development in nematodes can have up...Ch. 28 - The nematode cuticle contains. glucose skin cells...Ch. 28 - Crustaceans are ecdysozoans nematodes arachnids...Ch. 28 - Flies are ___________ . chelicerates hexapods...Ch. 28 - Which of the following is not a key advantage...Ch. 28 - Echinoderms have. triangular symmetry radial...Ch. 28 - The circulatory fluid in echinoderms is blood...Ch. 28 - Which of the following features does not...Ch. 28 - The sister taxon of the Chordata is the. Mollusca...Ch. 28 - Describe the different cell types and their...Ch. 28 - Describe the feeding mechanism of sponges and...Ch. 28 - Explain the function of nematocysts in cnidarians.Ch. 28 - Compare the structural differences between...Ch. 28 - Compare the differences in sexual reproduction...Ch. 28 - How does the tapeworm body plan support widespread...Ch. 28 - Describe the morphology and anatomy of mollusks.Ch. 28 - What are the anatomical differences between...Ch. 28 - How does a change in the circulatory system...Ch. 28 - Enumerate features of Caenoihabditis elegans that...Ch. 28 - What are the different ways in which nematodes can...Ch. 28 - Why are tardigrades essential to recolonizing...Ch. 28 - Describe the various superclasses that phylum...Ch. 28 - Compare and contrast the segmentation seen in...Ch. 28 - How do terrestrial arthropods of the subphylum...Ch. 28 - Describe the different classes of echinoderms...
    Knowledge Booster
    Background pattern image
    Biology
    Learn more about
    Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
    Similar questions
    SEE MORE QUESTIONS
    Recommended textbooks for you
    Text book image
    Biology 2e
    Biology
    ISBN:9781947172517
    Author:Matthew Douglas, Jung Choi, Mary Ann Clark
    Publisher:OpenStax
    Text book image
    Biology Today and Tomorrow without Physiology (Mi...
    Biology
    ISBN:9781305117396
    Author:Cecie Starr, Christine Evers, Lisa Starr
    Publisher:Cengage Learning
    Photosynthesis & Respiration | Reactions | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=3XIyweZg6Sw;License: Standard YouTube License, CC-BY