Questions in diversity-of-life

Select	Question
	Which of the following statements is true
	Which one feature is common to Amphioxus, frog, sea horse and crocodile
	Animals which show viviparity include
	All chordates at one or the other stage possess
	Herdmania belongs to which subphyla
	The jawless vertebrate is
	Which among the following is the only vertebrate osmoconformer
	Petromyzon belongs to
	The portal system seen in all vertebrates is
	The most important distinctive character of chordata is the presence of