The correct answer is: sea stars
All animals listed above are invertebrates. One of the characteristic of invertebrates are that they are protostomes with the exception of Echinodermata (sea stars). The difference between protostomes and deuterostomes is in their embryonic development (orgin of mouth and anus).
In protostomes the mouth forms first: the oral end of the animal develops from the first developmental opening. On the other hand in deuterostomes the first opening (the blastopore) becomes the anus, and the oral end of the develops from the second opening.
Humans are also deuterostomes.
A vertebrate is an animal with a backbone.
It was from darwin he was the 1
Communication is a very vital part of a research by a scientist like you. The typical methods of classroom scientific communication include lectures, lab reports, term papers and poster presentations. Writing papers can help you enhance your your science productivity and at the same time retaining some body of knowledge that would be of help to future researches. The presentations you make widens your connection and awareness to the community. Moreover, the discussions you make can facilitate learning and exchange of ideas.
