Read the following statements. (a) Over one-third of all named species on earth are arthropods. (b) All molluscs contain a file like a rasping organ for feeding. (c) Nereis possess parapodia which help in swimming. (d) Development is indirect in Bufo . Choose the incorrect statements

Step-by-step solution

Phylum Arthropoda: This is the largest phylum of kingdom Animalia which includes insects. Over two-thirds of all named species on earth are arthropods. Nereis possess lateral appendages, parapodia, which help in swimming. In Molluscs, the mouth contains a file-like rasping organ for feeding, called a radula. In Bufo (toad), fertilisation is external. They are oviparous, and development is indirect.