Phylogeny
You are a chordate. What four unique characteristics do all chordates possess during some point in their development? List when during development (gestation) each of these traits can be seen in humans.
The 4 unique characteristics are what I have listed below, but I can't seem to find anything on "when" these traits can be seen during developement.
1. Notochord
2. Dorsal, hollow nerve cord
3. Pharyngeal gill slits
4. Muscular post-anal tail
Phylogeny
You are a chordate. What four unique characteristics do all chordates possess during some point in their development? List when during development (gestation) each of these traits can be seen in humans.
The 4 unique characteristics are what I have listed below, but I can't seem to find anything on "when" these traits can be seen during developement.
1. Notochord
2. Dorsal, hollow nerve cord
3. Pharyngeal gill slits
4. Muscular post-anal tail
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The chordates share several features which have played asignificant role in the evolution of the phylum. Check all of thefeatures that one would use to exclusively classify members ofChordata and not members of Echinodermata.
| a postanal tail during embryonicdevelopment | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| pharyngeal pouches during embryonicdevelopment | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| an endoskeleton | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| a notochord on the dorsal side ofthe gut in the early embryo | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| deuterostomic development of theembryo | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| a hollow nerve cord 5. A number of major evolutionary innovations arose in the fishlineage. Check all of the evolutionary innovations associated withthe fishes.
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