Question

Which of the following is/are not the characteristics of the Class Osteichthyes? (i) Body is streamlined and mouth is terminal. (ii) Gills are covered'by operculum. (iii) Skin covered with cycloid and placoid scales. (iv) Many of them are viviparous.

• A. (iv) only
• B. (iii) and (iv)
• C. (i), (iii) and (iv)
• D. (i) and (ii)

Answer 1

Answer: (B)

(iii) and (iv)

Answer 2

In Osteichthyes, skin is covered with cydoid/ctenoid scales. They are mostly oviparous.