Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 33, Problem 33.1CR
Lacking tissues and organs, how do soonges accomplish tasks such as gas exchange, nutrient transport, and waste disposa I?
Expert Solution & Answer
Summary Introduction
To determine: How sponges perform “gas exchange, nutrient transport, and waste disposal” without tissues and organs.
Introduction: All sponges belong to the phylum Porifera. They are the simplest animals with the cellular level of organization. They have diverged forms than other animals early in evolution. Most of the body parts of sponges are asymmetrical. Sponges consist of pores in their body called ostia.
Explanation of Solution
The sponges have a relatively simple body plan with all cells of the body in direct contact with water. This allows excretion and exchange of gases to occur through diffusion. The sponges are filter feeders and contain choanocytes (collar cells) that help them to get food. The beating of flagella of choanocyte draws food particles along with water. The food particles stick to collar-like projections of the choanocytes. The food particles are then phagocytized and are either digested or passed on to the other cells called amoebocytes. These amoebocyte cells then transfer it to other cells of the body.
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Chapter 33 Solutions
Campbell Biology (11th Edition)
Ch. 33.1 - Prob. 1CCCh. 33.1 - Prob. 2CCCh. 33.2 - Compare and contrast the polyp and medusa forms of...Ch. 33.2 - VISUAL SKILLS Use the cnidarian life cycle...Ch. 33.2 - MAKE CONNECTIONS Many new animal body plans...Ch. 33.3 - Prob. 1CCCh. 33.3 - Prob. 2CCCh. 33.3 - MAKE CONNECTIONS Explain how the molluscan foot...Ch. 33.4 - Prob. 1CCCh. 33.4 - Describe two adaptations that have enabled insects...
Ch. 33.4 - MAKE CONNECTIONS Historically, annelids and...Ch. 33.5 - Prob. 1CCCh. 33.5 - WHAT IF? The insect Drosophila melanogaster and...Ch. 33.5 - MAKE CONNECTIONS Describe how the features and...Ch. 33 - Lacking tissues and organs, how do soonges...Ch. 33 - Describe the cnidarian body plan and its two major...Ch. 33 - is the lophotrochozoan clade united by unique...Ch. 33 - Describe some ecological roles of nematodes and...Ch. 33 - You've read that echinoderms and chordates are...Ch. 33 - A land snail, a clam and an octopus all share...Ch. 33 - Prob. 2TYUCh. 33 - The water vascular system of echinoderms (A)...Ch. 33 - Prob. 4TYUCh. 33 - In Figure 33.2, which two main clades branch from...Ch. 33 - MAKE CONNECTIONS In Figure 33.8, assume that the...Ch. 33 - Evolution connection Interpret thf data Draw a...Ch. 33 - Prob. 8TYUCh. 33 - Prob. 9TYUCh. 33 - SYNTHESIZE YOUR KNOWLEDGE Colleclively, do these...
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