Question

the nervous system of arthropods—japanese spider crabs, fleas, and many other animals that lack a spine—includes a brain, a nerve cord, and nerve tissues. javier vega - hernández, sarah losso, and team studied two fossils of mollisonia symmetrica, an extinct arthropod, and found clear traces of the animals optic nerve as well as visible indications of a synganglion, a brain - like nerve mass. researchers hope to determine more about the characteristics of m. symmetricas nervous system if additional fossils of the species are uncovered. 10 mark for review which choice best states the main topic? a differences between fleas and j b the discovery of a previously u c signs of the nervous system in d the reason arthropods do not

Explanation:

The passage starts by introducing the nervous - system components of arthropods, then focuses on the study of Mollisonia symmetrica fossils and the discovery of signs related to its nervous system. It's mainly about the signs of the nervous system in the fossils of an extinct arthropod.

Answer:

C. Signs of the nervous system in