What is an advantage of septate hyphae?

• A. Increases structure
• B. Decreases nutrient absorption
• C. Inhibits spore formation
• D. Causes rapid motility

Answer: (A)

Septate hyphae are divided into individual cells by cross-walls called septa, often with pores that allow cytoplasm and nutrients to flow between compartments. This arrangement gives the mycelium greater structural integrity, supporting taller and more robust growth and the formation of complex structures like fruiting bodies. If damage occurs in one cell, the septa help localize it to that compartment, preventing collapse of the entire filament while still allowing ongoing transport and communication through the pores. This compartmentalization also supports specialization of different regions for growth and metabolism, making the organism more resilient overall.

The other options don’t fit as well. Septa with pores actually facilitate nutrient movement rather than decrease absorption, so nutrient uptake isn’t reduced. Septate hyphae don’t inherently inhibit spore formation, which involves developmental processes beyond just septation. Hyphae aren’t motile in the way that statement implies; growth is by extension of the filament, not by rapid movement.