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Question #47565
The Question
Microscopic analysis of two distinct algal zoospores reveals the following: Zoospore X exhibits isokont flagellation (2-8 equal flagella) with apical basal body insertion, while Zoospore Y exhibits heterokont flagellation (2 unequal flagella) with lateral insertion. Based on these structural variations, which of the following statements is INCORRECT regarding their respective parent organisms?
Options
- A.
The parent organism of Zoospore X typically possesses a rigid cell wall with an inner layer of cellulose and an outer layer of pectose.
- B.
The parent organism of Zoospore Y stores reserve food as complex carbohydrates, which may be in the form of laminarin or mannitol.
- C.
The parent organism of Zoospore X utilizes Chlorophyll a and b, whereas the parent organism of Zoospore Y utilizes Chlorophyll a, d, and phycoerythrin.
- D.
The parent organism of Zoospore Y possesses a cellulosic cell wall usually covered on the outside by a gelatinous coating of algin.
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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
Classification System Nuances|Stem Modifications|Economic Importance Matrix
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The student must first correctly map flagellar morphology to the respective algal classes (Isokont/Apical = Chlorophyceae; Heterokont/Lateral = Phaeophyceae).
The trap lies in Option C, which pairs the heterokont zoospore with Rhodophyceae pigments (Chl a, d).
This tests two overlapping concepts: the specific pigment profiles of algal classes and the critical NCERT fact that Rhodophyceae entirely lack flagellated/motile stages.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Plant Kingdom - Class 11 |
| Concept | Classification System Nuances |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |