Study the following and pick the correct combinations:
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- Polychaeta have parapodia (e.g., Nereis), but Pheretima is an oligochaete.
- Hirudinea have botryoidal tissue (e.g., Pontobdella).
- Anthozoa have polypoid forms (e.g., Adamsia).
- Ctenophora do not have cnidocytes but possess colloblasts for prey capture.
Step 1: Identifying Incorrect Combinations Polychaeta (I) has parapodia, but the given example Pheretima is incorrect. Pheretima is an Oligochaeta (earthworm). Hirudinea (II) is correctly associated with botryoidal tissue, and Pontobdella is a valid example. Anthozoa (III) consists of polypoid forms, and Adamsia (a sea anemone) is a correct example. Ctenophora (IV) does not possess cnidocytes; instead, they have colloblasts for prey capture, making this an incorrect match. Step 2: Selecting the Correct Combination
Since Hirudinea (II) and Anthozoa (III) are correctly matched, the correct option is:
\[
\textbf{(4) II, III.}
\]
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Approach Solution -2
To solve the problem, we need to match the given classes of organisms with their corresponding features and examples.
1. Understanding the Combinations: Let's analyze the provided combinations based on the table:
Class I - Polychaeta: Polychaetes have parapodia, which are paired appendages. The example given is Pheretima (earthworm), which fits this description.
Class II - Hirudinea: Hirudineans (leeches) have botryoidal tissue, and the example is Pontobdella.
Class III - Anthozoa: Anthozoans have polypoid forms, and the example provided is Adamsia (a type of sea anemone).
Class IV - Ctenophora: Ctenophores have ctenocytes (cells with cilia), and the example is Pleurobrachia.
2. Matching the Correct Combinations: The correct matches are:
I - Polychaeta matches with Parapodia and the example Pheretima (earthworm).
II - Hirudinea matches with Botryoidal tissue and the example Pontobdella (leech).
III - Anthozoa matches with Polypoid forms and the example Adamsia.
IV - Ctenophora matches with Ctenocytes and the example Pleurobrachia.
3. Conclusion: After matching, we can see that the correct option is:
