Animal Kingdom Questions

Vertebrates belongs to the phylum_________.

Which of the following classes has the largest number of animals?

Match the columns.\begin{tabular}{|l|l|}\hline\textbf{Phylum} & \textbf{Animal} \ \hlinei. Protozoa & a. Roundworm \ \hlineii. Nematoda & b. Amoeba \ \hlineiii. Arthropoda & c. Star fish \ \hlineiv. Echinodermata & d. Cockroach \ \hline\end{tabular}

When a Cuttlefish is described as a Molluscs, it is at which level of classification?