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Which one of the following pair of organisms contains the highest and least number of chromosomes respectively?
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A
Ophioglossum reticulatum and Myrmecia pilosula
💡 Explanation:
Ophioglossum reticulatum (2n = 1260): Highest known number of chromosomes in any life form.
Myrmecia pilosula (2n = 2): 2 for females, males are haploid and thus have one; lowest number of chromosomes among all organisms.