Fungi Pre Test

MOST are multicellular. Heterotrophic decomposers, parasites, or mutualists that get nutrients from almost anything by extracellular digestion. Have filamentous bodies (hyphae).

Cell walls of chitin which is more resistant to decomposition by bacteria.

Classified by how they reproduce and produce spores.

Slender filaments composing the body of the fungus. Each filament is made up of many cells.

Tangled mass of underground hyphae Producing high surface area to volume ratio to absorb food from the environment.

Incomplete barrier between cells of hyphae allowing cytoplasm and other cells to follow. Often these are missing. In such fungi, each hyphae is like a single cell with many nuclei.

Reproductive structure

Reproduce by budding, fragmentation, or releasing haploid spores.

A. Asexually form at the tips of hyphae.

See image

Two Hyphae of different "mating types" join together and produce a zygospore between them (like a fertilized egg in animals). Out of the fused hyphae grows anew type of hyphae, with two nuclei per cell, one from each parent (sometimes called a dikaryotic hyphae). This sexual hyphae then gives rise to many spores, which fall off and "sprout" into new hyphae. Sometimes, the sexual hyphae divides, branches, and produces a large sporocarp or "fruiting body".

Fused hyphae with two new nuclei per cell, one from each parent.

Fruiting body.

Spores can be carried great distances in the air since they are light. When spores land in a suitable place, they divide forming new hyphae.

A resting spore that contains zygotes formed during the sexual phase of the mold's life cycle.