Question

In which one of the following the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct

• A. \(\begin{array}{|c|c|c|c|}
  \hline
  & \text{Genus} & \text{Two characters} & \text{Phylum} \\
  & \text{name} & & \\\hline
  \text{(a)} & \text{Pila} & \underline{\text{(a) Body Segmented}} & \text{Mollusca} \\
  & & \text{Mouth with radula} & \\\hline
  \end{array}\)
• B. \(\begin{array}{|c|c|c|c|}
  \hline
  & \text{Genus} & \text{Two characters} & \text{Phylum} \\
  & \text{name} & & \\\hline
  \text{(b)} & \text{Asterias} & \underline{\text{(b) Spiny Skinned}} & \text{Echinoermata} \\
  & & \text{Water vascular system} & \\\hline
  \end{array}\)
• C. \(\begin{array}{|c|c|c|c|}
  \hline
  & \text{Genus} & \text{Two characters} & \text{Phylum} \\
  & \text{name} & & \\\hline
  \text{(c)} & \text{Sycon} & \underline{\text{(c) Pore bearing}} & \text{Porifera} \\
  & & \text{Canal system} & \\\hline
  \end{array}\)
• D. \(\begin{array}{|c|c|c|c|}
  \hline
  & \text{Genus} & \text{Two characters} & \text{Phylum} \\
  & \text{name} & & \\\hline
  \text{(d)} & \text{Periplaneta} & \underline{\text{(d) Jointed appendages}} & \text{Arthropoda} \\
  & & \text{Chitinous exoskeleton} & \\\hline
  \end{array}\)

Answer 1

The correct option is A \(\begin{array}{|c|c|c|c|}

\hline
& \text{Genus} & \text{Two characters} & \text{Phylum} \\
& \text{name} & & \\\hline
\text{(a)} & \text{Pila} & \underline{\text{(a) Body Segmented}} & \text{Mollusca} \\
& & \text{Mouth with radula} & \\\hline
\end{array}\)
Molluscs are soft bodied animals. Their body is unsegmented with a distinct head, muscular foot and visceral hump. In Pila, the buccal cavity contains a resping organ, the radula with transverse rows of teeth.