Which one of the following phyla is correctly matched with its two general characteristics?
echinodermata - pentamerous radial symmetry and mostly internal fertilization
Mollusca - normally oviparous and development through a trochophore or veliger larva
Arthropoda - body divided into head, thorax and abdomen and respiration by tracheae
Chordata - notochord at some stage and separate anal and urinary openings to the outside.
