Which of the following options correctly matches a genus with its two characters and its phylum?
1. Obelia (i) Alternation of polyp and medusa Cnidaria
(ii) Comb plates help in locomotion
2. Nereis (i) Metameric segmentation Annelida
(ii) Jointed legs
3. Sepia (i) Gills have respiratory and excretory functions Arthropoda
(ii) File-like radula for rasping
4. Ascidia (i) Ventral heart Chordata
(ii) Notochord in larval tail

Moderate

Solution

Sepia belongs to Mollusca.
Jointed legs are absent in Nereis.
Obelia lacks comb plates. Comb plates are a characteristic of ctenophores.
Ascidia has notochord in tail and ventral heart - Urochordata.

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1.	Obelia	(i)	Alternation of polyp and medusa	Cnidaria
		(ii)	Comb plates help in locomotion
2.	Nereis	(i)	Metameric segmentation	Annelida
		(ii)	Jointed legs
3.	Sepia	(i)	Gills have respiratory and excretory functions	Arthropoda
		(ii)	File-like radula for rasping
4.	Ascidia	(i)	Ventral heart	Chordata
		(ii)	Notochord in larval tail