Part 1B: Fungi Most fungi are capable of undergoing both sexual and asexual reproduction. When fungi reproduce they create spores either through mitosis (asexual reproduction) or meiosis (sexual reproduction). The structure containing asexual spores is called a sporangium. The body of the fungus is a series of threadlike structures called hyphae. Procedure: 1. Observe the pictures of Rhizopus (bread mold) sporangia in the Lots and Lots of Cells PowerPoint. 2. How does the number of offspring produced for the fungus compare to that of the Paramecium? 3. The sporangia of bread mold are visible above a slice of bread, while the hyphae are found inside the bread. Why do you think the fungus has this arrangement?
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This step involves visually examining the images of the sporangia, which are the structures that contain asexual spores in the bread mold. This observation will help in understanding the morphology and distribution of these reproductive structures in the fungus. Show more…
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Fill in the blank with the REPRODUCTIVE feature Chytrids: Motile SPORANGIA with flagella Mushroom (club fungi): Sexual spores are produced on club-shaped structures called BASIDIA Ascomycota (sac fungi): Sexual spores found internally in sacs called ASCI Zygomycota: ZYGOSPORES During sexual reproduction in Rhizopus (Bread mold/Zygomycota) the structures of the two mating strains that fuse together are called GAMETANGIA. These structures house the haploid nuclei. Once these haploid nuclei fuse, the area where fusion has taken place develops into a structure called ZYGOSPORANGIUM Fill in the blanks Ascomycetes, Penicillum and Aspergillus reproduce asexually by forming spores called CONIDIA on modified hyphae called CONIDIOPHORES Sexual reproductive structure of zygomycota (bread mold, e.g. Rhizopus) formed after karyogamy is called ZYGOSPORANGIUM whereas its asexual reproductive structure is the SPORANGIUM A LICHEN is an organism in which an ascomycete (a heterotroph, nonphotosynthetic) lives symbiotically with a photosynthetic algae or cyanobacteria Three growth forms of lichens are: CRUSTOSE (thallus close to surface on which it grows); FOLIOSE (some of thallus folds away from surface to form sheets; and FRUTICOSE (thallus grows to form stalks) Basidiocarp (mushroom) is a tight bundle of dikaryotic hyphae called MYCELIUM Yeast reproduces by the process of BUDDING which produces a progeny cell that is smaller than the parental cell
Sri K.
Phylum Zygomycetes Sample: Rhizopus (common bread mold) Go online and get an image of this macroscopically and microscopically. Draw and label the following structures on your drawing: hyphae, sporangium, rhizoids, stolon. 1. Are there many or only a few spores within a single sporangia? Many 2. What do these spores form when they "germinate"? hyphae/mycelia 3. What is the function of the hyphae? absorb nutrients 4. What is the function of the rhizoids? 5. What is the function of the sporangium? produce spores? 6. Does this species reproduce sexually or asexually? Explain.
Adi S.
23. In the culture of hyphae of Zygomycota, the hyphae lack septa and reproduce asexually by fungi using clumps of erect stalks. These stalks are called sporangiophores. 24. In the life cycle of a typical Basidiomycota, where would you expect to find dikaryotic cells? Primary mycelium, Secondary mycelium, or in the basidiospores. 25. Asexual reproduction is common among Ascomycetes and it occurs through conidia formed at the ends of modified hyphae called conidiophores. Karyogamy occurs within asci, and basidiospores are generated in basidia. None of the above are true.
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