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Question:

Select the correct statement regarding reproduction. Mating in dogs is synchronised with lunar cycle. Salamanders always have internal fertilisation. In Trygon, the male introduces sperms into the female through a modified pelvic fin. Catla has internal fertilization.

In Trygon, the male introduces sperms into the female through a modified pelvic fin.

Catla has internal fertilization.

Mating in dogs is synchronised with lunar cycle.

Salamanders always have internal fertilisation.

Solution:

Mating in dogs is not synchronised with lunar cycle. Six of the nine families of Salamanders have internal fertilisation. Catla has external fertilisation.