01:119:116 Lecture 4: LEcture 4

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:116
• Professor: beal

Document Summary

1-. 1. 5 bya (divergence between animals and the rest of the. Fungi on land before plants (land plants ~470 mya) Nutrition and ecology i. ii. iii. iv. v. Decomposers: absorb nutrients from non-living organic material a) Parasites: absorb nutrients from cells of living hosts a) i. e. athlete"s foot. Mutualists: absorb nutrients from host organisms, but reciprocate to host"s benefit vi. Hyphae: long, branched, thread-like filaments i) ii) iii) Grow longer -> allow fungus to expand to new food source b) Feeding network that grows around and within food source ii. Fruiting bodies: complex, multicellular reproductive stricture (i. e. mushrooms) c. Haustoria: penetrate plant or animal tissue - parasitic or mutualistic. Land in moist place with food -> germinate -> new mycelium b. Mating type genes encode pheromones and pheromone receptors. # of mating types depend on # of alleles. Sexual reproduction depends on pheromones produced from different alleles of the same gene i.