CAMPBELL BIOLOGY-EBOOK
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ISBN: 9780134443959
Author: Urry
Publisher: PEARSON
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Chapter 33.3, Problem 2CC
Summary Introduction
To explain: How the anatomy of Annelids can be called as “a tube within a tube”.
Concept introduction: Annelids are coelomate animals with true segmentation. They are triploblastic and bilaterally symmetrical. They are found in diverse habitats such as damp soil, mud, oceans and rock crevices.
The word annelida has been derived from Latin word ‘annuli’ which means little rings. The body of annelids is made up of a number of rings like segments called metameres. Each segment is separated from other by septa with repetition of organs in each septum. The phylum Annelida includes a number of animals such as earthworm, leeches and others.
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Chapter 33 Solutions
CAMPBELL BIOLOGY-EBOOK
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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- Briefly explain why the classification of adult Urochordates used to cause great confusion in the past.arrow_forwardIn what annelid groups are septa between coelomic compartments lost? Whatadvantages does this loss give each group?arrow_forwardThe body plan of an annelid displays _________ , meaning that the body is divided into a series of repeated regions.arrow_forward
- Does the lack of a digestive system in tapeworms indicate that it is a primitive, ancestral form of Platyhelminthes? Explain your answer.arrow_forwardDescribe the features of an animal classified in phylum Annelidaarrow_forwardCompare the reproductive system of an earthworm with that of Ascaris. Be sure to note both similarities and differences.arrow_forward
- What type of a body plan doescoelenterates, ctenophores andechinoderms have?A. Annelida B. RadialC. Bilateral D. Platyhelminthesarrow_forwardAll of the following are characteristics of annelids except a coelom. a complete digestive tract. segmentation. excretion via nephridia. metamorphosis.arrow_forwardCompared to platyhelminthes which physiological problem have the cylindrical body of nematodes brought? How was that problem solved?arrow_forward
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