1.

Which of following characteristic features always holds true for corresponding group of animalsA. 3-chambered heart with one incompletely divided ventricle ........ReptiliaB. Cartilaginous endoskeleton.......ChondrichthyesC. Viviparous.......MammaliaD. Possess a mouth with an upper and lower jaw........Chordata.

Answer» Correct Answer - B


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