Lab 2 Flashcards
(30 cards)
LUCA
Last universal common ancestor
polytomies
unresolved portions of the phylogeny
transformation
acquiring DNA from decomposing biota
transduction
acquiring DNA via bacteriophages
conjugation
transferring plasmids
plasmids
single, ring-like chromosome and sometimes small satellite rings
bacteria morphologies
spherical shaped (coccus)
rod/capsule-shaped (bacillus)
spiral-shaped (spirilliform)
coccus shapes
coccus, diplococcus, streptococcus, staphylococcus
cyanobacteria
- blue-green algae
- express phycocyanin (blue-green pigment)
- make chlorophyll a pigments
- photoautotrophs
- fix carbon from CO2 into carbon containing molecules during photosynthesis
- producers
bioavailable
-cycle nutrients
nitrogen cycle
fix nitrogen from N2 in the atmosphere into other nitrogen-containing compounds that are cycled among the biota.
-required nitrogenase
nirogenase
breaks the triple bond between nitrogen atoms and N2 gas.
heterocytes
express genes that enable them to fix atmospheric N2 into ammonia.
Euglena
free-living and parasitic protists phototrophic heterotrophic mixotrophic contain chlorophyll in their plastids possess eyespot pigment- positively phototaxic producers
cellular differentiation
specialization
holdfast
attach to substrate
stipe
stem
blades
surface area for photosynthesis
Fucus
intertidal brown alga
gas bladders
ensure blades are erect and collect solar energy
dioecious
male and female reproductive tissues/gametes are found in separate individuals
monoecious
a single individual possess both male and female reproductive tissues/gamates
receptacles
found at tips of the blades, reproductive tissues are found
ciliates
unicellular heterotrophs covered in cilia
