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Lymphoid organs in the immune system, includes the bone marrow
Biological Classification.
The classification system starts with a group with a wide variety of organisms and becoming more selective as the groups get more specific.
Additional information: Carl Linnaeus classified organisms by shared characteristics.
Answer:
Any combination of D, E and F
Explanation:
Since A, B, and C belong to different orders, and D, E and F belong to the same order, the latter are more closely related and thus are expected to show a greater degree of structural homology. They are closer to their common ancestor than A, B and C.
