Examkin

Question

Difficulty: EasyHigher Invertebrates: Annelida, Mollusca, Arthropoda, and Echinodermata

Match each higher invertebrate phylum in Column A with its characteristic anatomical feature in Column B.

  • AnnelidaMetameric body segmentation with chitinous chaetae
  • MolluscaSoft unsegmented body with a mantle and a radula
  • ArthropodaChitinous exoskeleton and jointed appendages
  • EchinodermataWater vascular system with tube feet

Answer

Annelida pairs with metameric body segmentation with chitinous chaetae; Mollusca pairs with soft unsegmented body with a mantle and a radula; Arthropoda pairs with chitinous exoskeleton and jointed appendages; Echinodermata pairs with water vascular system with tube feet.
Each phylum matches its exclusive hallmark anatomical adaptation: Annelida displays metameric segmentation with chaetae; Mollusca possesses a soft unsegmented body with a mantle and radula; Arthropoda has a chitinous exoskeleton with jointed appendages; and Echinodermata features a water vascular system with tube feet.

Step-by-Step Solution

1
Identify the diagnostic feature of phylum Annelida
Annelids exhibit metameric segmentation (internal and external repetition of body units) and chitinous chaetae.
Metamerism and chaetae are core defining traits of segmented worms.
2
Identify the diagnostic feature of phylum Mollusca
Molluscs are soft-bodied unsegmented invertebrates with a radula and a mantle.
The presence of a radula for rasping food is exclusive to molluscs.
3
Identify the diagnostic feature of phylum Arthropoda
Arthropods feature a hard chitinous exoskeleton and jointed appendages.
Jointed limbs and chitinous exoskeletons define the phylum Arthropoda.
4
Identify the diagnostic feature of phylum Echinodermata
Echinoderms possess a hydraulic water vascular system driving tube feet.
The water vascular system is an exclusive anatomical adaptation of echinoderms.

Key Concept

Diagnostic anatomical characteristics of higher invertebrate phyla
Rate this question

Topics

Higher Invertebrates: Annelida, Mollusca, Arthropoda, and Echinodermata

More questions from this topic