Read the following statements carefully: (i) In Porifera, digestion is both extracellular and intracellular. (ii) Ctenophores reproduce only by sexual means. (iii) In Annelids, the neural system consists of paired ganglia connected by lateral nerves to a double ventral nerve cord. (iv) Molluscs have a segmented body with a distinct head, muscular foot and visceral hump. (v) In Hemichordates, the circulatory system is

Step-by-step solution

Statement (i) is incorrect. In phylum Porifera (sponges), digestion is strictly intracellular. Statement (ii) is correct. In phylum Ctenophora, reproduction takes place only by sexual means. Statement (iii) is correct. Annelids possess a neural system consisting of paired ganglia connected by lateral nerves to a double ventral nerve cord. Statement (iv) is incorrect. Molluscs have an unsegmented body with a distinct head, muscular foot and visceral hump. Statement (v) is correct. Hemichordates have an open type of