Two synapomorphies of the somitichordata are relected in its name. They are the
ID: 82376 • Letter: T
Question
Two synapomorphies of the somitichordata are relected in its name. They are the presence of _________, and retention of larval characteristics such as ____________, neural tube, and postanal tail as adults. This second character is usually attributed to ________________.
stomata / spinal cords / deceleration
somites / notochord / paedomorphosis
protostoma / prochorda / protraction
stenosis / phrenosis / phonetics
notochord / somites / peramorphosis
1.stomata / spinal cords / deceleration
2.somites / notochord / paedomorphosis
3.protostoma / prochorda / protraction
4.stenosis / phrenosis / phonetics
5.notochord / somites / peramorphosis
Explanation / Answer
Ans: 2 somites, notochord, paedomorphosis.
Characters of (Cephalochordates and Crainiates)Somitichordates: cephalocordates and craniates belong to a group known as Somitichordata. Somitichordata- includes all chordates except tunicates.
1. Somites
2. The retention of larval features (retention by an organism of juvenile or even larval traits into later life- paedomorphosis) as adults, specifically, the notochord, neural tube, and tail.
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