Question

meaning of closely related species​

Answer 1

Answer:

In biology, a species complex is a group of closely related organisms that are so similar in appearance that the boundaries between them are often unclear. ... A species complex is in most cases a monophyletic group with a common ancestor, but there are exceptions.

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Answer 2

Answer:

a species complex is a group of closely related organisms that are so similar in appearance that the boundaries between then are often unclear