The sunflower species Helianthus anomalus is thought to have been formed by hybridization between the sunflower species H.petiolaris and H.annuus because it contains a set of chromosomes from both parental species.H.anomalus is most likely an example of instantaneous speciation through

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The formation of H. anomalus through hybridization between two different species, followed by a doubling of the chromosome number (allopolyploidy), is known as instant speciation. This rapid process results in a new species with a unique combination of characteristics.

The Sunflower Species Helianthus Anomalus Is Thought to Have Been