First slide

Classification of Animals

Question

Which of the following is considered a typical chordate as it exhibits all the fundamental chordate characters throughout its life?

Moderate

A

Amphioxus
B

Alligator
C

Ascidia
D

Aptenodytes

Solution

All the typical chordate characteristics - notochord, dorsal nerve cord, pharyngeal gill slits, post-anal tail are found in Amphioxus.
In Ascidia, chordate characteristics are present in the larval stage.
In Alligator and Aptenodytes notochord is replaced by the vertebral column.

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