AIIMS 2018 Botany Haplontic Life Cycle MCQ Question
Assertion: Spirogyra shows haplontic life cycle.
Reason: Zygotic meiosis ocurs in Spirogyra.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Option A is correct because Spirogyra exhibits a haplontic life cycle, characterized by a dominant haploid thallus and zygotic meiosis, where the zygote undergoes meiosis to produce haploid spores. This life cycle involves only one free-living stage, which is the haploid gametophyte, making it haplobiontic. Other options are not applicable as they do not provide relevant information or choices related to the haplontic life cycle or Spirogyra's reproductive strategy. Understanding these concepts is essential for recognizing the diversity of life cycles in algae and their ecological adaptations.
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