Exam 1: Lab Quiz 1 Flashcards
cyanobacteria are a morphophyletic lineage of photosynthetic ___
prokaryotes
cyanos are the only bacteria with ____ and ____ and ___
chlorophyll a, photosystem 1 and 2
what do cyanos use as an electron donor
water
what is a byproduct of cyanos photosysthensis
O2
what do most other bacteria use as an electron donor and produce as a by product?
H2S, Sulfer
range of cyanobacteria presence arriving to earth
3.5-3.9 billion years ago
prokaryotes means what
not eukaryotes
cyanobacteria store carbohydrates in what form
glycogen
internal paired membranes associated with photosynthesis is called what
thyloakid
thylakoids contain
chlorophyll
___ contain accessory pigments and are associated with thyloakoids
phycobilisomes
do all cyanobacterias have a cell wall
yes
what is the name of the structure that surrounds cyanobacteria on top of their cell wall
mucilaginous sheath
many cyanobacteria are able to move through ___
gliding
what is the term that means “defining features”
synapomorphic
synapomorphic features of cyanobacteria are (4)
chlorophyll a, phycobilins, photosystems 1 and 2, use water as electron donor in light reactions of phorosysthesis.
homoplasy means
acquisition of a biological feature by different monophyletic groups
there are over ___ known species of cyanobacteria
8000
cyanobacteria may be __, ___, or ___
unicellular, colonial, or filamentous
Cyanobacteria species have a ___ relationship with eukaryotes
symbiotic
heterocyst have ___ walled cells, what is their function?
heterocyst, enable fixation of inorganic nitrogen that can be used in biochemical pathways
___ are resistant cells, designed to permit bacterium to survive in adverse conditions
akinetes
cell type with storage products
akinetes
cell type that can germinate and form new filaments
akinetes
