Animal KingdomHard
Question
Which one of the following phyla is correctly matched with its two general characteristics ?
Options
A.Arthropoda - Body divided into head, thorax and abdomen and respiration by tracheae
B.Chordata - Notochord at some stage and separate anal and urinary openings to the outside
C.Echinodermata - Pentamerous radial symmetry and mostly internal fertilization
D.Mollusca - Normally oviparous and development through a trochophore or veliger larva
Solution
Arthropoda is the largest phylum of animal Kingdom. Body of arthropod is divided into head thorax and abdomen. Head and thorax ooften fused to form cephalothorax. The respiration takes place by general body surface, gills, Tracheae or book lungs.
Mollusecs are dioecious or monoecious, one or more gonads with gonoducts, opening into renal ducts or to exterior. The fertilization is external or internal, development direct or throught free larval forms.
Echinodermata have a pentamerous radial symmetry derived from an original bilateral development indirect through free-simming larval forms.
Chordates are sharpky distinguished from non-chordates by presence of notochord, pharyngeal gills slits.
Mollusecs are dioecious or monoecious, one or more gonads with gonoducts, opening into renal ducts or to exterior. The fertilization is external or internal, development direct or throught free larval forms.
Echinodermata have a pentamerous radial symmetry derived from an original bilateral development indirect through free-simming larval forms.
Chordates are sharpky distinguished from non-chordates by presence of notochord, pharyngeal gills slits.
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