Kingdom Protista Flashcards
unicellular eukaryotes are placed under which kingdom
protista
which kingdom does not have well defined boundaries
protista
habitat of protista
aquatic
do all protists have flagella or cilia
no
some do
how do protists reproduce
sexually as well as asexually
how do protists reproduce sexually
by a process which involves cell fusion and zygote formation
chrysophytes include
diatoms and golden algae
golden algae are also called
desmids
what are diatoms
photosynthetic algae
habitat of chrysophytes
fresh water and marine
those chrysophytes which float passively in water are called
planktons
structure of cell wall in diatoms
two thin overlapping shells like lid and base of a soap box
contains silica, hence indestructable
cell wall deposits of diatoms are called
diatomaceous earth
being gritty in nature, diatoms are used for
polishing, filtration of oils and syrups
cheief producers of the ocean
diatoms
habitat of dinoflagellates
marine
mode of nutrition of dinoflagellates
photosynthetic
colour of dinoflagellates
yellow
green
brown
blue
red
(depends on their main pigment)
structure of cell wall of dinoflagellates
has still cellulosic plates on outer surface
number of flagella in dinoflagellates
two
one is longitudinal
other is transverse which lies in a furrow between wall plates
example of a red dinoflagellate
Gonyaulax
what are red tides
red dinoflagellates multiply so rapidly, they make the sea appear red
toxins are released which may kill other marine animals
euglenoids habitat
fresh water organisms (stagnant water)
what do euglenoids have instead of cell wall
a protein rich layer called pellicle which makes their body flexible
do euglenoids have flagella
a long and a short one
mode of nutrition of euglena
photosynthetic in presence of sunlight
heterotropic when deprived on sunlight by preying on smaller organisms
what is identical in euglenoids and higher plants
pigments
example of a euglenoid
euglena viridus
mode of nutrition of slime moulds
saprophytic
where are slime moulds usually found
among twigs and leaves
how do slime moulds move
their body moves along decaying twigs and leaves engulfing organic material
under suitable conditions, slime moulds form an aggregation called ___________ which may grow and spread over several feet
plasmodium
in slime mould, during unfavourable conditions, plasmodium differentiates and forms
fruiting bodies which bear spores at their tips
do these spores of slime moulds have true cell wall
yes
do spores of slime mould survive in adverse conditions
yes, they are extremely resistant and survive for many years
spores of slime moulds are dispersed by
air currents
mode of nutrition of protozoans
heterotrophs ( predators / parasites )
which protists are believed to be primitive relatives of animals
protozoans
four major groups of protozoans
amoeboid
flagellated
ciliated
sporozoans
where do amoeboid protozoans live
fresh water, sea water, moist soil
how do amoeboid protozoans move and capture their prey
by putting out pseudopodia as in amoeba
what do marine forms of amoeboid protozoans have
silica shells on their surface
some of the marine forms of amoeboid protozoans such as ____________ are parasites
entamoeba
are flagellated protozoans free-living or parasitic
either
parasitic forms of flagellated protozoans cause diseases such as
sleeping sickness
which flagellated protozoan causes sleeping sickness
trypanosoma
habitat of ciliated protozoans
aquatic
cavity of ciliated protozoans which opens to outside of the cell is called
gullet
example of a ciliated protozoans
paramoecium
sporozoans include which organisms
that have an infectious spore-like stage in their life cycle
most notorious sporozoan
plasmodium (malarial parasite)
