I think they are all biotic factors..hmm if not take out whichever sounds the most not fitting.
I thinking the answer was for some genes, both alleles express together. Others combine to give an average phenotype....
Before the rise of the Mongols in the 13th century, it is now
called central and western Inner Mongolia, particularly the Hetao region,
change back and forth in control between Chinese agriculturalists in the south
and nomadic Mongol of the north. is known through Chinese chronicles and
historians.
Answer:
breakdown of a substance by bacteria, yeasts, or other microorganisms
Explanation: