Answer
b. hyphae
Work Step by Step
Hyphae consist of cells laid horizontally end to end. In more ancient types of fungi such as the zygote fungi and chytrids, the hyphae do not have cross-walls between them. More modern species of fungi such as the sac fungi and club fungi have cross-walls called septae between their cells. These septae allow materials such as water and nutrients to flow back and forth between cells.
