phylogeny 1 phylogeny2 phylogeny 3 314. Examine the following table of character

Question

phylogeny 1 phylogeny2 phylogeny 3 314. Examine the following table of characters in four different species of flower. Based on the matrix, which character defines a synapomorphy shared by species A and 8? Species A yes Species B Species C yes Specics D yes five whorled no scpals Number of petals Arrangement ofwhorled petals Number of carpels five ten ten whorledhocled ten ten ten five presence of sepals number of petals arrangement of petals number of carpels 15. Organisms in the same family will all be from the same genus. True . False

Explanation / Answer

Synapomorphy means traits that appear in most recent common ancestor.

Number of petals is the trait/character only shared between species A and B and not common with species C and D.It defines synapomorphy between species A & B.

Presence of sepals is a trait shared amongst species A,B and C. Species D doesn't show the trait, it might not have evolved to show presence of sepals or lost the trait during evolution. Species D also has only 5 number of carpels, distinct from other species.

Arrangement of Petals is the only trait shared amongst all the species.Thus, this trait also isnt the one that depicts synapomorphy between species A and B.On the other hand , this trait depicts synapomorphy amongst all the species A, B,C and D.

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