Q7: Select all correct answer choices Which is/are true of hemichordates and echinoderms:A. Dorsal hollow nerve chord (collar chord)B. Tripartite body organizationC. Embryos exhibiting radial indeterminate cleavageD. All of the aboveE. B & C onlyB. Tripartite body organizationE. B & C onlyA. Dorsal hollow nerve chord (collar chord)C. embryos exhibiting radial indeterminate cleavageD. All of the above

Answered: Which is/are true of hemichordates and…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Q7: Select all correct answer choices

Which is/are true of hemichordates and echinoderms:
A. Dorsal hollow nerve chord (collar chord)
B. Tripartite body organization
C. Embryos exhibiting radial indeterminate cleavage
D. All of the above
E. B & C only
B. Tripartite body organization
E. B & C only
A. Dorsal hollow nerve chord (collar chord)
C. embryos exhibiting radial indeterminate cleavage
D. All of the above

Expert Solution

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Presence of notochord and dorsal tubular hollow nerve cord is the main characteristics of chordate. Hemichordata does not have true notochord. We also say it false notochord. The name hemichordata arise because nerve cord is specified in a collar region. As it's not spread along the entire length that's why it's called hemichordata.

Tripartite body organization means body is divided into three regions- Proboscis, Collar and trunk.

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