Q. Which one of the following phyla is correctly matched with its two general characteristics?
A) Mollusca - Normally oviparous and development through a trochophore or veliger larva
B) Arthropoda - Body divided into head, thorax and abdomen and respiration by tracheae
C) Chordata - Notochord at some stage and separate anal and urinary openings to the outside
D) Echinodermata - Pentamerous radial symmetry and mostly internal fertilization
Explanation
[Solution from source] Molluscs are usually oviparous with indirect development, typically via trochophore and veliger larvae. Arthropods breathe by gills, book lungs or tracheae and are not all divided into head, thorax and abdomen; echinoderms have external fertilisation; and many chordates have a common cloacal opening. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.