ch 29 bio III

fungi evolved from _____ and are related to _______

protists; animals

fungi causing human illness

about 300 - low incindence level compared to other organisms

fungi impact on food supply

destructive - causes billions of dollars of crop losses each year

what type of fungi are responsible for losses due to spolage

saprophytic fungi

2 growth forms of fungi

single celled or multicellular, filamentous forms

hyphae

long narrow filaments

filements are divided into cells by ____

septa

septa

incomplete cross - walls

pores

allow materials to flow between compartments

coenocytic

lack septa - many nuclei are scattered throughout the mycelium

nutrient movement in fungi

rapid through septa pores or through coenocytic fungi

dynamic

mycelia are dynamic - constantly grow in the direction of food sources and die back in areas where food is running out

highest surface area to volume ratio of all multicellular organism

mycelia

mycelia makes nutrient absorption

extremely efficient