A Mycologist Visits Your Biology Class and Discusses Her Research

A mycologist visits your biology class and discusses her research on a particular fungus that lives on the bark of damaged spruce trees. She explains that the fungal hyphae of her research organism is heterokaryotic. You raise your hand and request that she define that word. Her correct response is

A) heterokaryotic means that the nuclei of the fungal hyphae are genetically the same.
B) heterokaryotic means that the nuclei of each compartment of the hyphae are genetically distinct.
C) heterokaryotic means that each compartment of the hyphae contain two distinct nuclei.
D) heterokaryotic means that each compartment of the hyphae contains only one nucleus.