Procaryotic Heterotrophic cells? Is this a typo? Help

[Icy]

Im doing my hsc via correspondence thou OTEN, Ive been asked to find the definitions of Procaryotic heterotrophic cells. Is this a typo in my assignment. I can only find it spelt with a k, {Prokaryotic} Pls Help! Thanks.

[Darby]

It can be spelled either way.