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The Eukaryotes: Fungi, Algae, Protozoa, and Helminths

12. The Eukaryotes: Fungi, Algae, Protozoa, and Helminths. Domain Eukarya. Table 12.1. The Fungi. Eukaryotic Aerobic or facultatively anaerobic Chemoheterotrophic Most are decomposers Mycology is the study of fungi. Mycology: The Study of Fungi. Table 12.2. Molds.

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The Eukaryotes: Fungi, Algae, Protozoa, and Helminths

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  1. 12 The Eukaryotes: Fungi, Algae, Protozoa, and Helminths

  2. Domain Eukarya Table 12.1

  3. The Fungi • Eukaryotic • Aerobic or facultatively anaerobic • Chemoheterotrophic • Most are decomposers • Mycology is the study of fungi

  4. Mycology: The Study of Fungi Table 12.2

  5. Molds • The fungal thallus consists of hyphae; a mass of hyphae is a mycelium. Figure 12.2

  6. Figure 12.1 - Overview

  7. Yeasts • Unicellular fungi • Fission yeasts divide symmetrically • Budding yeasts divide asymmetrically Figure 12.3

  8. Dimorphism • Pathogenic dimorphic fungi are yeastlike at 37°C and moldlike at 25°C Figure 12.4

  9. Fungal Life Cycle Figure 12.7

  10. Fungal Diseases (Mycoses) • Systemic mycoses: Deep within body • Subcutaneous mycoses: Beneath the skin • Cutaneous mycoses: Affect hair, skin, and nails • Opportunistic mycoses: Caused by normal microbiota or environmental fungi

  11. Conidiospores – asexual spore production Figure 12.5a–c

  12. Sexual Spores • Zygospore: Fusion of haploid cells produces one zygospore. Figure 12.6

  13. Sexual Spores • Ascospore: Formed in a sac (ascus). Figure 12.7

  14. Sexual Spores • Basidiospore: Formed externally on a pedestal (basidium). Figure 12.8

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