lecture 7 protists and prokaryotes Flashcards
(20 cards)
what is leishmania
kinetoplastid flagellate protist
dog is reservoir
sandfly is vector
causes liver/spleen damage
what is the importance of protists in ecological processes
algal protists produce 30% of photosynthesis
could help produce global warming
carbon sink
amoebae
respiration
aerobic
amoebae_____trophic
heterotrophic
amoebae
reproduction
asexual
what amoebae are natural inhabitants of guts
entamoeba coli
what causes dysentry, eye infections, keratitis
amoebae
what is circumfluence
feeding method of naked amoebae
what is circumfluence
feeding method of naked amoebae
what are testate amoebae
enclosed in a calcareous shell
doesnt move
project cytoplasm to feed
where do testate amoebae live
freshwater
marine
terrestrial
where do radiolarians live and how do they feed
marine only
pseudopodia radiate from the centre reinforced by mictrotubules covered in thin layer of cytoplasm. cytoplasmic streaming carries captured prey into the main part of the cell
what is physarum polycephalum
acellular slime mould
life stages of slime mould
feeding stage; plasmodium
what is physarum polycephalum
cellular slime mould
life stages of slime mould
feeding stage; plasmodium
slug time baby
erects stalks with fruiting bodies (specialisation)
spores released
they become cells and be fertlized to make a feeding plasmodium
primary endosymbiosis
eventually led to the formatioon of mitochondria and chloroplasts
how did endosymbiosis happen
first occurred when a large anaerobic cellengulfed a smaller aerobic bacteria. This aerobic bacteria was able to use oxygen in the atmosphere to sustain itself and produce energy
evidence for mitochondria
size of bacteria has own ribosomes double membranes own genome related to a proteobacteria
origin of mitochondria
bacteria in eukaryote not digested
host cell provide protection and carbon
bacteria provide ATP
