Question

Match the name of animal (Column I), with one characteristic (Column II) and phylum/class (Column III) to which it belongs and select the correct combination from the four options.
$\begin{array}{cccc}& \text{Column I}& \text{Column II}& \text{Column III}\\ a& \text{Adomsia}& \text{Radially symmetrical}& \text{Porifera}\\ b& \text{Petromyzon}& \text{Ectoparasite}& \text{Cyclostomata}\\ c& \text{Ichthyophis}& \text{Terrestrial}& \text{Reptilia}\\ d& \text{Limulus}& \text{Body covered}& \text{Pisces}\\ & & \text{by chitinous}& \\ & & \text{exoskeleton}& \end{array}$

• A. Limulus, Body covered by chitinous exoskeleton, Pisces
• B. Ichthyophis, Terrestrial, Reptilia
• C. Adamsia, Radially symmetrical, Porifera
• D. Petromyzon, Ectoparasite, Cyclostomata

Answer 1

The correct option is D Petromyzon, Ectoparasite, Cyclostomata

Petromyzon - Ectoparasite - Cyclostomata

• Petromyzon (Lamprey) is categorised under the class Cyclostomata under the division Agnatha.
• They are devoid of jaws and live as ectoparasites on other fishes.
• Hence, the combination given in option (b) is correct.

Final answer
b. Petromyzon - Ectoparasite - Cyclostomata