Which factor is not used to define biomes?
a.
plant structures
b.
leaf type
c.
historical similarities
d.
climate

The correct answer is - c. historical similarities.

The historical similarities do not play any role in defining a present day existing biome. The biome is defined by the living organism that interact between each other, and the physical environment where those organisms live.

The historical similarities can play a role in defining a biome of the geological past by carefully connecting the information available.

answerinternational border(ib);