The author posted a question in Homework
в чем проявляеться усложнение троения хордовых животных в сравнеии бепозвоночными например кольчатыми червыми?<br >? and got a better answer
Response from Дима[+++]
Chordates have a chord, invertebrates don't. Is there a complication?
Response from 0[+++]
Chordates have a chord, invertebrates don't. The complication is obvious.
Chordates have a chord, invertebrates don't. The complication is obvious.
Response from 0[+++++]
The appearance of the internal skeleton, which gives a wide field for further differentiation and perfection of the nervous system.
The appearance of the internal skeleton, which gives a wide field for further differentiation and perfection of the nervous system.