Raven Johnson Biology Chapter 32 Answers to Review Questions 1. Hyphae are slender filaments. A mass of hyphae is a mycelium. As it applies to fungi, a septum is a cross wall that may divide the hyphae into cells. The septum is complete when it separates the reproductive structures from the rest of the mycelium.
Incomplete septa permit the movement of reproductive materials between cells.
The fungal wall is composed of polysaccharide and chitin, which is an advantage because it renders the wall more resistant to degradation bacteria. The fungal nuclei that are diploid are those of the zygote. All the rest are haploid. The event that occurs during sexual reproduction is that the hyphae of two genetically different mating types fuse. This affects the other nuclei because the nuclei do not fuse but coexist as separate entities.