Members of Genus X,a Hypothetical Taxon of Invertebrates,have Antennae with a Variable

question 32

Multiple Choice

Members of genus X,a hypothetical taxon of invertebrates,have antennae with a variable number of segments.Species A and B have 10 segments;species C and D have 9 segments;species E has 8 segments;and species F has 7 segments.In all other genera in this family (including genus Y,the sister genus of genus X) ,all species have antennae with 10 segments.Which character state most likely is a synapomorphy that would be useful for determining evolutionary relationships within genus X?

• A) 10-segment antennae in species A and B
• B) 10-segment antennae in genus Y and in two species of genus X
• C) Antennae with fewer than 10 segments in species C,D,E,and F
• D) 8-segment antennae in species E
• E) 7-segment antennae in species F

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