Question -
Identify the pairs that are correctly matched.
(i) Crocodile Four chambered heart (ii) Sea urchin Parapodia (iii) Obelia Metagenesis (iv) Chondrichthyes Placoid scales
Options:
A .  (i), (iii) and (iv)
B .  (ii), (iii) and (iv)
C .  (i) and (iv)
D .  (i) and (ii)
Answer: Option A : A Reptiles generally have a three chambered heart, except a few groups such as crocodiles, which have a four chambered heart. Sea urchin is an echinoderm, and does not have parapodia. Parapodia are locomotory organs found in invertebrates such as annelids (e.g., Nereis). Obeliais a cnidarian that exhibits metagenesis, which is an alternation of generations between an asexual polypoid stage and a sexual medusoid stage. Chondrichthyes is the taxonomic class that includes cartilaginous fishes such as shark. They typically have their skin covered with placoid scales.
Submit Your Solution hear: