Use the following phylogenetic tree of opsin sequences from

Use the following phylogenetic tree of opsin sequences from vertebrates to answer Which kind of opsin, found in multiple animals, is monophyletic?

91 67 100 99 100 100 100 92 99 100 100 100 chicken red marmoset red 100 human red 100 human green bovine rod 72 human rod 100 mouse rod chicken rod goldfish rod goldfish green 1 chicken green gecko blue chicken blue goldfish blue goldfish UV Xenopus violet chicken violet budgerigar UV mouse blue 100 bovine blue 85 100 marmoset blue human blue Drosophila Rh3

Solution

The meaning of monophyletic is the group which descends from a common ancestor but is not shared with any other group.

Thus in this case, Drosophila RH3 (unable to read it properly, image not clear) is belongs to monophyletic opine group.