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Question #46110
The Question
Read the following statements regarding the anatomical and phylogenetic transitions in protochordates. Which of the following statements is INCORRECT?
Options
- A.
In Urochordates, the notochord is present only in the larval tail and is lost during retrogressive metamorphosis.
- B.
The extensive true coelom of the Urochordate larva expands in the adult to form the large cavity housing the pharyngeal branchial basket.
- C.
Cephalochordates retain their notochord from the head to the tail region throughout their entire life cycle.
- D.
The reduction of the true coelom in adult tunicates correlates with their transition from a motile larval stage to a sessile, filter-feeding lifestyle.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Chordata|Eucoelomate|Retrogressive_Metamorphosis
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Distinguishing between the true coelom (mesodermal) and the atrial cavity (ectodermal) in Urochordates.
Common Misconception: Students often assume the massive internal water-filled cavity used for filter-feeding in adult tunicates is an expanded coelom.
They fail to recognize that retrogressive metamorphosis drastically reduces the true coelom as the organism abandons motility, replacing its functional space with the atrial cavity.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Animal Kingdom - Class 11 |
| Concept | Coelom Categorization |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |