Question

Which among the following is incorrect about Osteichthyes?

(a) Swim bladder helps them retain buoyancy

(b) Many of them are edible

(c) Gills are separate without operculum

(d) Skin covered with cycloid/ ctenoid scales

I got this question in a national level competition.

My query is from Animal Kingdom in section Animal Kingdom of Biology – Class 11

Answer 1

The correct answer is (c) Gills are separate without operculum

Best explanation: Swim bladder helps them retain buoyancy. Many of them are edible. Gills have operculum. Skin covered with cycloid/ ctenoid scales. Most of the Osteichthyes like Katla and Rhono are edible.