Can bipartite graphs have isolated vertices?

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Can a bipartite graph have some isolated vertices?

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A bipartite graph need not have exactly two unique parts. The condition is that you should be able to split it up into two parts such that the only edges in the graph go between the two parts and not within. The two parts need not have any edges between them at all, so in particular vertices can be isolated. The isolated vertices can go in either part.