Question

Nervous system was 1st found in
a sponges
b hydra
c tapeworm
d amoeba ​

Answer 1

Answer:

(b) hydra

Explanation:

Most cnidarians, such as those of the genus Hydra, have what is called a nerve net—a meshlike system of individual and separate nerve cells and fibres dispersed over the organism. Species of Hydra have two nets, one located between the epidermis and the musculature and the second associated with the gastrodermis.