Q.75 Choose the correct answer from the Match List I with List II :
List I – Phylum
- (A) Porifera
- (B) Ctenophora
- (C) Platyhelminthes
- (D) Annelida
List II – Salient features
- (I) Body segmentation like rings
- (II) Body with pores and canals in walls
- (III) Comb plates for locomotion
- (IV) Flat body, suckers
Choose the correct answer from the options given below :
- (1) (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
- (2) (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
- (3) (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
- (4) (A)-(III), (B)-(II), (C)-(I), (D)-(IV)
Porifera features porous bodies for filter feeding, Ctenophora uses comb plates for movement, Platyhelminthes has flattened bodies often with suckers, and Annelida shows ring-like segmentation. The correct option matches each phylum to its defining characteristic.
Phylum Characteristics
These invertebrate phyla represent early animal evolution with distinct body plans.
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Porifera (A): Body with pores and canals in walls (II) for water circulation and feeding.
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Ctenophora (B): Comb plates (ctenophores) for locomotion via ciliary beating (III).
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Platyhelminthes (C): Flat body, often with suckers for attachment (IV).
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Annelida (D): Body segmentation like rings (metamerism) (I).
Option Analysis
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Option (1): (A)-(IV), (B)-(III), (C)-(II), (D)-(I) wrong; Porifera not flat/suckers, Platyhelminthes not pores.
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Option (2): (A)-(I), (B)-(II), (C)-(III), (D)-(IV) incorrect; Porifera not segmented, Ctenophora not pores.
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Option (3): (A)-(II), (B)-(III), (C)-(IV), (D)-(I) correct; precise alignment with salient features.
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Option (4): (A)-(III), (B)-(II), (C)-(I), (D)-(IV) fails; Porifera no comb plates, Annelida not flat.
Correct answer: (3).
Phylum matching questions for Porifera (pores and canals), Ctenophora (comb plates locomotion), Platyhelminthes (flat body suckers), and Annelida (ring segmentation) test invertebrate zoology fundamentals for exams like GATE Life Sciences.
Invertebrate Phyla Overview
These basal metazoans show progression from cellular (Porifera) to tissue-level organization with segmentation.
Correct Matches Table
Phylum (List I) Feature (List II) Example (A) Porifera (II) Body pores/canals Sponges (B) Ctenophora (III) Comb plates locomotion Comb jellies (C) Platyhelminthes (IV) Flat body, suckers Flatworms, flukes (D) Annelida (I) Ring segmentation Earthworms Option Breakdown
Options 1/4 mismatch pores/flat; 2 confuses segmentation/pipes; 3 matches textbook features exactly. For prep, note Porifera’s choanocytes, Ctenophora’s colloblasts, Platyhelminthes acoelomate nature, Annelida’s setae.
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