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Chordata Characteristics Quiz

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Questions and Answers

Where is the nerve cord situated in chordates?

Dorsally (correct)

Ventrally

In the presence of ganglia

Absent in chordates

What is the main characteristic feature of chordates?

Absence of a nerve cord

Presence of a dorsal notochord (correct)

Presence of a ventral notochord

Lack of pharyngeal pouches

Which direction does the blood circulation run in chordates?

Anterior to posterior ventrally and from anterior to posterior dorsally

Posterior to anterior ventrally and from posterior to anterior dorsally

Posterior to anterior ventrally and from anterior to posterior dorsally (correct)

Anterior to posterior ventrally and from posterior to anterior dorsally

What is the special body region situated posterior to the anus in chordates?

<p>Postnatal region</p> Signup and view all the answers

What do chordates share with non-chordates as common features?

<p>Bilateral symmetrical segmentation</p> Signup and view all the answers

Study Notes

Chordate Characteristics

In chordates, the nerve cord is situated dorsally, above the notochord, and runs along the length of the body.
The main characteristic feature of chordates is the presence of a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
In chordates, the blood circulation runs in a double circulation pattern, where oxygenated blood from the heart runs anteriorly and deoxygenated blood runs posteriorly.
The special body region situated posterior to the anus in chordates is the post-anal tail.
Chordates share with non-chordates the common features of bilaterally symmetrical body, segmental organization, and coelom.

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Description

Test your knowledge of the main characteristic features of animals belonging to the phylum Chordata, including the presence of dorsal notochord and other defining traits. This quiz is based on lectures notes in comparative anatomy.