Question

Study the following and pick up the correct combinations: \renewcommand{\arraystretch}{1.3} \begin{table}[h!] \centering \setlength{\tabcolsep}{10pt} \begin{tabular}{|c|c|c|c|} \hline S. No & Phylum & Characteristic Feature & Example
\hline I & Porifera & Choanocytes & Physalia
II & Cnidaria & Stinging cells & Euspenigia
III & Ctenophora & Lasso cells & Pleurobrachia
IV & Platyhelminthes ) & Flame cells & Fasciola
\hline \end{tabular} \end{table}

• A. I, II
• B. II, III
• C. \textbf{III, IV}
• D. I, III
  \

Hint:

Each phylum has unique characteristic features: - Porifera have choanocytes (collar cells) for filter feeding. - Cnidaria have cnidocytes (stinging cells) for defense. - Ctenophora have colloblasts (lasso cells) for prey capture. - Platyhelminthes use flame cells for excretion.

Answer 1

The Correct Option is C

Understanding the characteristic features of each phylum
- I - Porifera (Choanocytes) → Incorrect
- Porifera (sponges) are characterized by choanocytes, but the given example Physalia is incorrect.
- Physalia belongs to Cnidaria, not Porifera.
- II - Cnidaria (Stinging Cells) → Incorrect
- Cnidarians (jellyfish, corals) have stinging cells (cnidocytes), but the example Euspenigia is incorrect.
- The correct example should be Obelia or Hydra.
- III - Ctenophora (Lasso Cells) → Correct
- Ctenophores (comb jellies) have lasso cells (colloblasts), used for capturing prey.
- Example Pleurobrachia is correct.
- IV - Platyhelminthes (Flame Cells) → Correct
- Platyhelminthes (flatworms) have flame cells, which help in excretion.
- Example Fasciola (liver fluke) is correct.
Examining the given options
- Option 1 (I, II) → Incorrect (Both have incorrect examples).
- Option 2 (II, III) → Incorrect (II is incorrect).
- Option 3 (III, IV) → Correct, as both III and IV are correctly matched.
- Option 4 (I, III) → Incorrect (I is incorrect).
Conclusion
Since the correct matches are Ctenophora with Lasso cells (Pleurobrachia) and Platyhelminthes with Flame cells (Fasciola), the correct answer is Option (3): III, IV.