The Question is from neet-zoology animal-kingdom protochordata, and it was created by the author A SUBRAMANYAM

Question

The unique excretory organ found in *Branchiostoma* is known as:

A SUBRAMANYAM · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Excretory systems in invertebrates
 **Related Topics**:  Amphioxus anatomy, protonephridia, solenocytes, metanephridia, Malpighian tubules
 **Prerequisites**: Basic understanding of invertebrate excretory structures.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the excretory organ in *Branchiostoma* (lancelet), a member of the Cephalochordata.
  *Branchiostoma* is a simple chordate lacking true kidneys.
**Method & Steps**:
 1. Identify the type of excretory system present in *Branchiostoma*.
  Reasoning: *Branchiostoma* possesses a unique excretory system composed of solenocytes.
  Formula/Rule: N/A
 2. Eliminate incorrect options.
  Working: Protonephridia are found in some invertebrates, but not uniquely in *Branchiostoma*. Metanephridia are found in annelids and mollusks. Malpighian tubules are found in insects and other arthropods.
  Key Point:  Solenocytes are characteristic of the *Branchiostoma* excretory system.
 3. Confirm the correct option.
  Result: Solenocytes are the unique excretory organs in *Branchiostoma*.
  Verification:  Textbooks and reliable biological resources confirm this fact.
 ## OPTION ANALYSIS
A :x: Protonephridia are flame cells found in flatworms and some other invertebrates, but not unique to *Branchiostoma*.
B :x: Metanephridia are found in annelids and mollusks.
C :x: Malpighian tubules are excretory organs in insects and other arthropods.
D ✓: Solenocytes are the characteristic excretory structures of *Branchiostoma*.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing solenocytes with other excretory structures: Understanding the unique morphology and function of solenocytes is crucial to avoid this mistake.
  2.Generalizing excretory systems across phyla:  Different invertebrate groups have evolved distinct excretory systems adapted to their specific needs.
 **Quick Tips**:
  1.Remember that *Branchiostoma* is a simple chordate with a simple excretory system.
  2.Associate solenocytes specifically with *Branchiostoma*.

A SUBRAMANYAM · Answer

Protonephridia

A SUBRAMANYAM · Answer

Metanephridia

A SUBRAMANYAM · Answer

Malpighian tubules

A SUBRAMANYAM · Answer

The correct Option is "Solenocytes"

NEET Zoology Animal Kingdom Protochordata MCQs

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