Lecture 14 Flashcards
which organisms are the most abundant worldwide, metabolically diverse, and have rapid rate of cell division
prokaryotes
what type of climates can prokaryotes live in
some can live in extreme cold or heat, darkness, or anaerobic environments
what type of sexual preproduction do prokaryotes have
conjugation, transformation, and transduction
what are endospores
Dormant resting cells when food supply is low;
Resistant to heat, radiation, and chemical disinfectants
how are autotrophs metabolically diverse
photosynthetic or chemosynthetic (oxidize inorganic compounds instead of using light)
how are heterotrophs metabolically diverse
most are saprophytes
what are some characteristics of cyanobacteria
chlorophyll a, carotenoids, phycobilins, live in a variety of environments, some fix nitrogen
how are purple and green bacteria’s photosynthesis different
use sulfur and other compounds instead of water; live in anaerobic conditions with large amounts of decaying matter
where do purple and green bacteria get their colors from
colors from photosynthetic pigments
what are the large three groups of Archaea
extreme halophiles, methanogens, extreme thermophiles
what are viruses
primarily a genome (DNA or RNA) that replicates within a host cell
how can plant viruses be spread
plant viruses are carried by insects
how do viruses move through plants
via plasmodesmata, and through phloem
what type of viruses are RNA viruses
plant viruses
what is already know about fungi
eukaryotic, heterotrphic, unicellular/multicellular, cell wall of chitin, no plastids or photosynthetic pigments
what is the ecological importance of fungi
decomposition
what are the medical uses of fungi
disease causing, medicines
what are the economic importances of fungi
agricultural pests, yeasts
what type of symbiotic relationships do fungi form
mycorrhizae, lichens, endophytes
what are fungi mostly composed of
hyphae
what are hyphae
fungal filaments
what are mycelium
mass of hyphae
what are the fungi’s hyphae divided by
septa
why do fungi have high surface area-to-volume ratio
they get their food from absorbing so that’s why they have a high surface area-to-volume ratio