The Question is from neet-zoology animal-kingdom , and it was created by the author K SUNKANNA

Question

Which phylum includes animals with a body plan characterized by a mantle, visceral mass, and muscular foot?

K SUNKANNA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Animal Phyla and Body Plans
 **Related Topics**: Molluscan anatomy, invertebrate zoology, comparative anatomy
 **Prerequisites**: Basic understanding of animal classification and body structures.
## SOLUTION PATHWAY
**Given Information**:
  The question describes a body plan with three key features: a mantle, a visceral mass, and a muscular foot.
  We need to identify the phylum to which animals with this body plan belong.
**Method & Steps**:
 1. Analyze the given features: Mantle, visceral mass, and muscular foot are characteristic features of mollusks.
  Reasoning:  The mantle is a fold of tissue that secretes the shell (if present), the visceral mass contains the internal organs, and the muscular foot is used for locomotion or attachment.
  Formula/Rule: N/A
 2. Compare the features to the options provided:
  Working:  Let's examine each option:
        * Annelida (segmented worms) lack a mantle, visceral mass, and muscular foot in the described way.
        * Mollusca (mollusks) possess all three features: mantle, visceral mass, and muscular foot.
        * Arthropoda (arthropods) have exoskeletons, segmented bodies, and jointed appendages; they don't have these specific features.
        * Echinodermata (echinoderms) have radial symmetry and a water vascular system; they lack these features.
  Key Point: Recognizing the defining characteristics of each phylum is crucial for accurate identification.
 3. Identify the correct phylum:
  Result: The phylum Mollusca includes animals with a mantle, visceral mass, and muscular foot.
  Verification:  The description perfectly matches the body plan of mollusks like snails, clams, and squids.
 ## OPTION ANALYSIS
A :x: Annelids have segmented bodies, but not a mantle, visceral mass, and muscular foot as described.
B ✓: Mollusks are characterized by a mantle, visceral mass, and muscular foot. This is the correct answer.
C :x: Arthropods have exoskeletons and jointed appendages; their body plan is significantly different.
D :x: Echinoderms have radial symmetry and a water vascular system; they lack the specified features.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the characteristics of different phyla: Careful study of the defining features of each phylum is essential to avoid this error.
  2.Overlooking key features: Pay close attention to all three features (mantle, visceral mass, muscular foot) to accurately identify the phylum.
 **Quick Tips**:
  1.Create a table summarizing the key characteristics of different animal phyla.
  2.Use mnemonics or visual aids to remember the defining features of each phylum.

K SUNKANNA · Answer

Annelida

K SUNKANNA · Answer

The correct Option is "Mollusca"

K SUNKANNA · Answer

Arthropoda

K SUNKANNA · Answer

Echinodermata

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