Chapter 25, There\'s A Fungus Among Us

Hyphae are the branching thread-like structures that make up the mycelium of a fungus, playing a key role in nutrient absorption and distribution.

Mycelium is the term used to describe a mass of hyphae grouped together. Sporangium, Cnidaria, and Stolon are not related to the grouping of hyphae in fungi.

In majority of fungi, the hyphae are divided into compartments by septa (cross walls) that allow for some structures, such as mitochondria and ribosomes, to pass.

Saprobes are organisms that obtain nutrients by breaking down dead or decaying organic matter. Most fungi fall under this category as they play a crucial role in the decomposition process.

Dikaryons refer to a stage in the life cycle of certain fungi where two genetically distinct nuclei coexist within the same hyphal compartment, resulting from hyphae fusion during mating.

Rhizoids in Rhizopus are anchoring hyphae that help the mold penetrate the bread and secrete digestive enzymes to break down nutrients for absorption. They are not spores for reproduction, specialized structures for asexual reproduction, or root-like structures for absorption.

Stolons in Rhizopus refer to the horizontal surface hyphae that spread out to seek new food sources and facilitate the growth of the mold.

Sporangiophores in Rhizopus serve as reproductive hyphae responsible for producing and dispersing spores for reproduction.

In the asexual reproduction cycle of Rhizopus, the spores first land on a substrate and form hyphae before developing into mycelium. The mycelium then produces sporangiophores containing sporangia that release spores to seek new substrate.

Phylum Ascomycota (sac fungi) are unique in their ability to form symbiotic relationships with algae, leading to the formation of lichens. The name 'Ascomycota' comes from the presence of a specialized structure called an ascus, which is responsible for producing spores known as ascospores.

In Phylum Ascomycota (Ascomycetes), sexual reproduction starts when hyphae with one nucleus of opposite mating strains come into contact. Each female gametangium, an ascogonium, forms a trichogyne that grows toward the male gametangium, called the antheridium. The asexual spores form singularly or in chains from conidiophores and are called conidia.

Mycorrhizae (phylum Glomeromycota) are fungi that form a mutualistic relationship with terrestrial plants, aiding in nutrient uptake in exchange for sugars produced by the plant.

Basidiomycetes are commonly referred to as 'club fungi' due to their distinct club-shaped spore-producing structures, the basidia. Additionally, they are saprotrophic, thriving on dead or decaying matter, and reproduce mainly through sexual means.

Basidiomycetes typically have distinct macroanatomical features that include specific structures such as volva, stipe, annulus, pileus, and gills. The incorrect answers provided have inaccurately described different structures that do not correspond to the typical anatomy of Basidiomycetes.

Lichens are a symbiotic relationship between a fungus and algae, with the fungus providing structure and protection while the algae perform photosynthesis.

Crustose lichens are known for forming brightly colored patches or crusts on rock or tree bark, without evident lower surfaces.

Fruticose lichens can have a variety of appearances, but they typically have a shrub-like or hanging moss-like appearance with either highly branched or cylindrical thalli.

Ascomycetes are characterized by their ascocarps which are the fruiting bodies containing the spore-bearing asci. This distinguishes them from Basidiomycetes which have basidia for spore production. Conidiophores are related to asexual spore production in fungi, while zoospores are typically found in lower fungi like Chytridiomycetes.

Phylum Chytridiomycota (Chytrids) are characterized by being unicellular, having cell walls composed of chitin, and displaying flagellated spores and gametes.