In septate fungi, what structures allow cytoplasmic streaming to distribute needed nutrients, synthesized compounds, and organelles throughout the hyphae?

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Question restatement: In septate fungi, what structures allow cytoplasmic streaming to distribute needed nutrients, synthesized compounds, and organelles throughout the hyphae?

Option analysis:
- a. Pores in septa: This is the key feature that enables cytoplasmic streaming in septate fungi. The septa are cross-walls that divide hyphae into compartments, and each septum contains pores that connect adjacent cytoplasmic compartments. Through these pores, cytoplasm, nutrients, organelles, and signaling molecules can move along the length of the hypha, facilitating distribution throughout the network. This directly explains how streaming distributes needed materials.

Notes on the absence of other options: The provided data lists only one answer option (a). In a typical multiple-choice task, other options might describe alternative structures (for example, an absence of septa, or a different kind of channel). Without additional options to evaluate, we can’t assess them individually here. However, if other choices were present, they would likely need to describe features that do not enable cytoplasmic continuity between hyphal compartments, which would make them incorrect relative to the mechanism described by septal pores.

Summary of why a is correct: The septal pores are the structural conduit that permits cytoplasmic streaming across septa, enabling distribution of nutrients, synthesized compounds, and organelles along the hyphae in septate fungi.

BIO 112-004 - Spring 2025 Fungi

In septate fungi, what structures allow cytoplasmic streaming to distribute needed nutrients, synthesized compounds, and organelles throughout the hyphae?

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