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(B) The neural organization in animals shows an evolutionary trend towards increasing complexity.$1$. In lower invertebrates (like Cnidarians),the neu

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Lower invertebrates $\rightarrow$ Insects $\rightarrow$ Vertebrates

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(B) The neural organization in animals shows an evolutionary trend towards increasing complexity.$1$. In lower invertebrates (like Cnidarians),the neural organization is very simple and consists of a network of neurons.$2$. In insects,the neural system is better organized; they possess a brain along with a number of ganglia and neural tissues.$3$. In vertebrates,the neural system is the most highly developed,featuring a complex central nervous system (brain and spinal cord) and a peripheral nervous system.Therefore,the correct order of increasing complexity is: Lower invertebrates $\rightarrow$ Insects $\rightarrow$ Vertebrates.

Select the correct arrangement of neural organization,according to the increasing degree of complexity.

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