According to the phylogeny in the figure, which of the following statements is true?
A) All chordates have a neural tube.
B) Cephalochordates have a neural crest.
C) Echinoderms have a neural tube.
D) All chordates have a neural crest.

Question

According to the phylogeny in the figure, which of the following statements is true? 
A) All chordates have a neural tube. 
B) Cephalochordates have a neural crest. 
C) Echinoderms have a neural tube. 
D) All chordates have a neural crest.

Quizplus · Accepted Answer

The figure shows that all chordates have a neural tube, which is supported by the presence of a neural tube in all of the chordate subphyla (cephalochordates, urochordates, and vertebrates). The figure does not provide evidence for the presence of a neural crest in any particular group. Echinoderms are not chordates, and therefore are not discussed in the context of this question.

According to the Phylogeny in the Figure, Which of the Following