I believe the term is nitrogen assimilation. Plants cannot simply fix, or convert nitrogen into ammonia which is necessary for all living organisms. This is why they have to assimilate nitrogen, or rather absorb it for their own needs, unlike animals who can get their nitrogen from the food they eat.
<span>Killer whales are much more common in highly productive cold water areas. These include the Atlantic, the Pacific Northwest, and the higher latitudes of the Southern Ocean.</span>
