Arrange the animals in a sequence that reflects the complexity of their nervous systems in the process of evolution.
| December 8, 2020 | education
1) hydra – diffuse;
2) lancelet – a neural tube;
3) shark – spinal cord and brain;
4) toad – spinal cord and brain;
5) crocodile – spinal cord and brain;
6) orangutan – spinal cord and brain.
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