Question

Fertilization is internal in(a) toads (b) frogs(c) dog fish (d) cat fish

Answer 1

a.Internal
b.Internal
c.External
d.External

Answer 2

Answer:

Dog fish is the correct answer.

Explanation:

Internal fertilization is the occurrence of internal insemination as the mode of combining sperm and egg. Dog fish is found mostly in shallow waters. For dog fish, fertilization is internal. The male insert one clasper into female oviduct orifice and injects sperms. They are commonly found at the depth of around 50 to 149 m. life span of dog fish is near about 100 years.

For both frogs and toads,  fertilization occurs in external.