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 convered by operculum.
(iii) Skin convered 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

Correct Answer - B
In Osteichthyes, skin is covered with cycloid`//`ctenoid scales. They are mostly oviparous.