Lecture 13 - Fungi 1 Flashcards
Through molecular data, what kingdom is closest to fungi?
Animalia
What is the name of the clade that includes fungi and animals?
opisthokonta
What does the root word “opistho” mean?
Posterior
True or false:
the fossil record of fungi is very complete and used for relative dating.
False
it is rather poor
When is it thought that fungis transferred to land
around 475 MYA
What is one of the possible forms that fungi may have taken when first transferring from water to land?
Symbionts
What does the root word “myc” mean?
Fungas
All fungus are _______________trophs
Chemoheterotrophs
How do fungi digest their food?
Through external digestion.
fungi secrete powerful enzymes outside their bodies.
What can fungi digest from both plant and animal tissues?
From plants: cellulose and lignin
from animals: Chitin and keratin.
What are the cell walls of fungi made of?
Chitin
The bodies of most fungi are comprised of what?
Hyphae
What is the interwoven hyphal mat called?
Mycelium
Within fungi, mycelium acts as a _____ network
Feeding
What are the two main types of hyphae?
Sepate and coenocytic
What are sepate hyphae?
cross-walls (septa) that divide cells into separate chambers.
What are Cienicytic hyphae?
Coencytic lack walls, and are just continuous cytoplasum with hundreds or thousands of nuclei.
What does the root word “coen” mean?
Communal
What is the functional purpose of filamentous structures within fungi?
Allows for large surface area:volume ratio.
How do fungi reproduce?
They reproduce through the generation of spores, both asexually and sexually.
The nuclei and spores of non-chytrid fungi are always ________
Haploid
How do non-chytrid fungi reproduce?
Through the generation of single-celled diploid zygote formed within sexual reproduction.
True or false:
Hyphae only grow in width and nit in length.
False.
The single celled diploid zygote of non-chytrid fungi is _______
transient
Do fungi have gametes?
No (aside from a select few chytrids)
Do fungi have sexes?
Nope.
for the lucky few fungi that do have sex, how do they do it? ;)
The mycelia from genetically different individuals fuse.
The fusion of fungal cytoplasm is called…
plasmogamy
a mycelium with 2 or more different genotypes of separate nuclei is called a __________.
Heterokaryon
What is it called when two genetically different nuclei move in to inhabit and share one hyphal compartment?
Dikaryotic
What is it called when two nuclei fuse?
karyogamy.
What are the advantages of long-term maintenance of the dikaryotic state?
Flaws in one hapliod genome can be compensated for by teh good regions in the other genome.
What fungal phylum contains chytridion?
Chyidiomycota
What does ‘Chytridion’ mean?
Flower pot