Question

Ladder like nervous system is characteristic of
(a) earthworm
(b) leech
(d) Planaria
(e) roundworm
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Answer 1

D. planaria .

hope it help u

Answer 2

Question :-

Ladder like nervous system is characteristic of

(a) earthworm

(b) leech

(d) Planaria

(e) roundworm

Required Answer :-

(d) Planaria

Explanation :-

Flatworms (Planaria)

The central nervous system has been described as "ladder-like" because of the nerves connecting the nerve cords. Flatworms have "auricles" that project from the side of the head. These auricles contain chemoreceptors that are used to find food. Flatworms also have eyespots called "ocelli".