Question

What was significant about the joining of the two kingdoms under narmer?

Answer 1

The correct answer of the given question above would be THE DOUBLE CROWN SIGNIFIED A UNITED EGYPT. What was significant about the joining of the two kingdoms under Narmer is the double crown which signified a united Egypt. This occurred in 3100 BC. Hope this answer helps. 

Answer 2

After joining the two kingdoms, Menes, sometimes known as Narmer, became the first pharaoh.

it was the most important significant under two kingdoms

hope it helps