Yes. Being a vertebrate in the animal kingdom, all chordates have a "hollow dorsal nerve chord'' aka vertebral column or spine or backbone.
no
Planarians are bilaterally symmetric worms that possess almost unlimited regenerative capacities. The ventral nerve cords are located in the segment (brains) of the worm.
whayt does cords main
Yes. all animals that have a an endoskeleton and a backbone will be present with a dorsal nerve cord.
Yes. Dugongs are vertebrates.
YES. Frogs do have spinal cords.
both have a nerve cord
Dugongs live in estuaries.
The nervous system of a roundworm is very simple. Ventral and dorsal nerve cords run through the roundworm's entire body. These cords come from the nervous tissue ring around its pharynx.
Dugongs are tagged with tracking devices, this is done for that scientists can monitor their population and keep tract of the dugongs
There is an organisation that is called Dugongs Reach-out.
Nothing eats dugongs, but dugongs eat seagrasses tiger sharks are natural enemies of dugongs so they can get killed by them.