Which of the following character is present essentialy in chordates
Ventral spinal chord
Dorsal heart
Pharyngeal gill slits
Blood flow in forward direction in ventral blood vessels
Class Crustacea differs from lnsecta in having
two pairs of antennae
jointed foot
chitinous cuticle
none of the above
In contrast to annelids the platyhelminthes show
radial symmetry
presence of pseudocoel
bilateral symmetry
absence of body cavity
