(a) List any two main characteristics of protochordates.
(b) In which class would you place any organism which has-
(i) four chambered heart and lay eggs.
(ii) skeletons made of both bones and cartilage and are cold-blooded.
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3
they are nonrochord they have lungs they have 2 chambered heart .........
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They have notochords
They have dorsal hollow nerve chord
They have pharyngeal Gill slits
They have anal tails
Aves
They have dorsal hollow nerve chord
They have pharyngeal Gill slits
They have anal tails
Aves
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