Multiple Choice
A __________ is a chordate but not a vertebrate.
32. Vertebrates
Chordates
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Which of the following can be found in vertebrates but not in lancelets and tunicates?
A
Neural crest
B
Two or more clusters of Hox genes
C
Duplications of genes that produce signaling molecules and transcription factors
D
None of the listed responses is correct.
E
All of the listed responses are correct.
Verified step by step guidance1
Understand the key differences between vertebrates and invertebrate chordates like lancelets and tunicates. Vertebrates have more complex structures and genetic features.
Identify the neural crest, which is a group of cells that forms along the edges of the neural tube in vertebrates and contributes to the development of various structures, such as the peripheral nervous system. This feature is not found in lancelets and tunicates.
Recognize that vertebrates have two or more clusters of Hox genes, which are crucial for the development of body plans. In contrast, lancelets and tunicates have fewer Hox gene clusters.
Consider the duplications of genes that produce signaling molecules and transcription factors. These duplications are more prevalent in vertebrates, allowing for more complex regulation of development.
Conclude that all the listed features (neural crest, multiple Hox gene clusters, and gene duplications) are characteristics of vertebrates and are not found in lancelets and tunicates, making the statement 'All of the listed responses are correct' true.
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