Exam 3 Flashcards
(142 cards)
What is the life cycle of asexual reproduction for fungi?
Spores
Germination
Mycellium
Spore-producing structures
What is the life cycle of sexual reproduction for fungi?
Spoers Germination Mycellium Plasmogamy Heterokaryotic stage Karyogamy Zygote
Why are fungus considered heterotrophs and how do they accomplish this?
Fungus are heterotrophs because they receive their carbon source from other organisms
They accomplish this by decomposition
What part of the body in fungi divide the hyphae into different cells?
Septa
What are hyphae?
Individual branches used by fungi to obtain nutrients
What are mycelia?
Network of hyphae that have adapted for absorption
What are specialized hyphae that can penetrate the tissue of host called?
Haustoria
What are septa?
Divides the hyphae into different cells, compartments
What are haustoria?
Specialized hyphae that can penetrate their host’s tissue
What are the five fungus groups?
Chytrids - flagellated spores (zoospores)
Zygomycetes - produce zygosporangia
Glameromycetes-form arbuscular mycorrhizae
Ascomycetes - Sac fungi
Basidiomycetes - Have basidium
What are basidium?
Clublike structures where karyogamy occurs
What is arbuscular mychorrhizae?
Penetrates host cell and forms hyphae inside
What are zygosporangia?
Metabolically inactive sporangia
Resistant to freezing and drying
What is the ecological importance of fungi?
Essential for breaking down organic material and recycling nutrients into the enviornment
What is a lichen and what are the three different types?
A lichen is a symbiotic relationship between fungus and photosynthetic microorganisms. Crustose (crusty), Foliose (leafy), Fructicose (shrubby).
What is a single celled fungi?
Yeasts
What are yeasts?
Single celled fungi
What is a network of highly branched hyphae called?
Mycelia
What is the difference between septate and coenocytic hyphae?
Septate hyphae contain septa while coenocytic hyphae do not contain septa
What is plasmogamy?
Union of two parent mycellium
What is a heterokaryon?
Two haploid nuclei exist in one mycellium but haven’t fused yet
What is karyogamy?
Fusion of two haploid cells to create a zygote
What are flagellated spores called?
Zoospores
What are zoospores?
Flagellated spores