This preview shows page 1. Sign up to view the full content.
Unformatted text preview: In their vegetative state, these organisms exist as thin, streaming masses of protoplasm, bound by a cell membrane and containing many nuclei, that move in amoeboid fashion. This stage is referred to as a plasmodium . Examine and draw living material of Physarum , a representative plasmodial slime mold. Locate the plasmodium, the central veins of protoplasm, and evidence of a slime sheath. Is this organism haploid or diploid? Where are the nuclei located? Can you see evidence of cytoplasmic streaming? When the food supply and/or water becomes limiting, the plasmodium stops moving and begins to form a series of small mounds. Each mound develops into a mature sporangium (a spore-containing sac) sitting on top of a narrow stalk (usually). The sporangium is the site of meiosis. Products of meiosis are spores. Are the spores haploid or diploid? Sketch the dried Physarum sporangia on demonstration under the dissecting microscope....
View Full Document
This note was uploaded on 12/27/2011 for the course BSC 1020 taught by Professor Danmoon during the Fall '11 term at UNF.
- Fall '11