How can we help?

You can also find more resources in our Help Center.

16 terms

Chapter 17: Fungi

i met a cool bro the other day. he was a pretty fungi. lawl fun guy
STUDY
PLAY
Fungi
Have body structures and modes of reproduction unlike those of any other organism. Are heterotrophs but they acquire nutrients by absorption rather than eating.
Absorption
Used by fungi. When they secrete powerful enzymes that digest their food outside their bodies and then absorb the smaller nutrient molecules into their cells.
Parasites (Fungi)
Fungi that obtain their nutrients at the expense of living plants and animals.
Hyphae
Threadlike filaments that pack tightly together making up fungi. Surrounded by cell walls made mostly of chitin, a strong, flexible nitrogen containing polysaccharide. Most occur in chains of cells separated by cross walls that have pores large enough to allow ribosomes, mitochondria and nuclei to flow from cell to cell.
Mycelium
When hyphae come together they form a large feeding network. Is the starting point for mushrooms. Stays underground and eats until its reproduced to the point where its above ground where it can disperse spores.
Heterokaryotic Stage
When cells contain two genetically distinct haploid nuclei. Hours or even days can pass before parental nuclei fuse forming the short lived diploid phase. Zygotes undergo meiosis from which haploid spores are dispersed.
Mold
Refers to any rapidly growing fungus that reproduces asexually by produced spores, often at the tip of specialized hyphae.
Yeast
Refers to any single-celled fungus that reproduces asexually by cell division or by budding.
Imperfect Fungi
Fungi that have no known sexual stage, including many molds and yeasts. All but one group lack flagella.
Cytrids
The only fungi with flagellated spores, thought to be the earliest lineage of fungi. Common in lakes ponds and soil. Can be decomposers or parasites.
Zygomycetes
Create a resistant zygosporangium in which haploid spores form by meisosis. Either parasitic or saprobes. Live in soil. Includes black bread mold and rhizopus.
glomeromycetes
Form a distinct type of mcycorrhiza in which hyphae that invade plant roots branch into tiny treelike structures known as arbuscules. Has symbiotic relationship wit 90% of its plants. Delivers phosphate and other minerals in exchange for nutrients.
Ascomycetes
Sac Fungi. Have sac like structures named asci that hold 8 haploid spores called ascospores. Largest division of fungi. Examples: Morels, powdery mildews, and yeasts. Many cause diseases. Ergot is a produced disease which is main source of lsd.
Basidiomycetes
Club Fungi. Most familiar. Mushrooms puffballs and shelf fungi. Called club fungi for their club shaped head known as the basidium. Many excel at breaking down the lignin found in wood making them great decomposers.
Mycosis
Fungal infection. Ringworms and athlete's foot are examples.
Lichens
25000 different species. Consist of two parts; cyanobacteria and fungi.