Lecture 8 - Slime molds - fungus-like eukaryotes Flashcards
- have both fungal and amoeba-like qualities
- hunters of bacteria and fungi
- will produce spores in unfavorable conditions (survival, not reproduction)
slime molds
life cycle of cellular slime molds
- amoeba stage
- slug stage
- fruiting body
germinate from a spore
amoeba stage
- many amoebas aggregate and sheath forms
- migration
slug stage
releases spores which germinate into amoebas
fruiting body
plasmodial (acellular) slime molds
- mass of protoplasm with many nuclei (plasmodium)
- capable of sexual reproduction
Two phyla of slime molds
- cellular slime molds
- plasmodial slime molds
favorable conditions, cellular slime mold exist as
amoeba
unfavorable conditions, cellular slime molds
- congregate and fuse
- form multicellular mushroom
favorable conditions, plasmodial slime molds exist
- plasmodium
- giant “amoeba”
plasmodium
multi-nucleate mass of protoplasm
unfavorable conditions, plasmodial slime molds
- mold like
- spread out forming “mycelium
- produce clump of spores
- few are human parasites
- anatomy and life cycle modified for parasitism
- adult stage in definitive host
- each larval stage in specific intermediate host
helminths (parasitic worms)
helminths phylum
- Platyhelminthes (flatworms)
- Nematoda (roundworms)
class under Phylum Platyhelminthes
- Trematodes (flukes)
- Cestodes (tapeworms)
host of helminths in adult stage
definitive host
host of helminths in each larval stage
specific intermediate host
Life cycle of helminths
Egg –> larva(e) –> adult