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What organism has the largest number of chromosomes?

Ophioglossum reticulatum, a species of fern, has the largest number of chromosomes (thread-like bodies in a cell's nucleus that hold the genes) with more than1,260(630 pairs).

Source: Trefil, James,1OO1Things Everyone Should Know About Science, p. 106.

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1. Terms And Classification
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   2. How are animals and plants classified into groups and who began trie practice?
   3. What are the five kingdoms presently used to categorize living things?
   4. How many different organisms have been identified by biologists?
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   7. What is a biological clock?
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   4. What is genetic engineering?
   5. What organism has the largest number of chromosomes?
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   8. What is DNA fingerprinting?
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   4. What is the scientific study of fungi called?
   5. What is a lichen?