What are the microscopic strands called that grow from germinating fungi spores?

The microscopic strands that grow from germinating fungi spores are referred to as hyphae. When a fungal spore germinates, it produces these filamentous structures, which are crucial for the growth and development of the fungus. Hyphae are responsible for nutrient absorption and can spread throughout the substrate, forming a network that allows the fungus to grow and reproduce effectively.

The term "mycelia" actually refers to a mass or network of hyphae that forms the vegetative part of the fungus. While mycelia are composed of hyphae, the question specifically asks for the individual strands rather than the collective structure.

Rhizomorphs are specialized structures formed by certain fungi to transport water and nutrients, playing a different role in fungal biology than the basic hyphae.

Sporelings are typically small, immature forms that develop from spores but do not directly refer to the filamentous structures that emerge from the spores itself.

Thus, hyphae accurately describe the initial growth structures from germinating spores.