characteristics of protists Flashcards
A colony is a loose association of
independent cells
Volvox
– A hollow sphere
– Thousands of cells arranged in a
single layer surrounding a watery
interior
Volvox
in volvox aureus Each cell of colony resembles a
Chlamydomonas cell
(formerly Bacillariophyta)
Diatoms
Diatoms are formerly called
Bacillariophyta
are the most numerous unicellular
algae in the oceans
Diatoms
Significant portion of
phytoplankton
Diatoms
its cell walls contains silica
Diatoms
3 ways Diatomaceous earth used as
– Filtering agents
– Sound-proofing materials
– Polishing abrasives
Small freshwater unicellular
organisms
Euglena
is characterized as mixotroph
have two flagella and an eyespot
Euglena
how many flagella does euglena have
2 flagella
a protist that produces paramylon
euglena
what produces
an unusual type of carbohydrate
called paramylon
pyrenoid
Most common flagellate in human digestive tract
Giardia lamblia
Causes severe diarrhea
Giardia lamblia
Cysts are transmitted in contaminated water
Giardia lamblia
Beavers are important reservoir hosts
Giardia lamblia
Sexually transmitted protist
Trichomonas vaginalis
Infects urogenital organs; a common cause of vaginitis
is a very common digestive tract parasite
Giardia lamblia
it’s a unicellular
protozoan parasite.
Giardia lamblia
It lives in the intestinal tracts of
canines and felines, and can actually impact humans
too and trigger gastrointestinal upset, vomiting and
diarrhea and affect growth in canines.
Giardia lamblia
The infection this
parasite triggers is called Giardiasis.
Giardia lamblia
The infection this
Giardia lamblia triggers is called
Giardiasis
are called hydrogenosomes because they produce hydrogen gas as a byproduct.
Parabasalids
a parabasalid that causes a sexually transmitted disease in humans, employs these mechanisms to
transit through the male and female urogenital tracts.
Trichomonas vaginalis
includes parasites, heterotrophs,
autotrophs, and mixotrophs, ranging in size from 10
to 500 μm.
Euglenozoans
move through their aquatic habitats using two long flagella that guide them toward light
Euglenoids/Euglena
encompasses some
mixotrophic species that display a photosynthetic
capability only when light is present.
Euglena
shrink up
and temporarily cease functioning when in dark
euglena
is common in central Africa and is the
causative agent of African sleeping sickness
Trypanosoma brucei
a disease associated with severe chronic fatigue, coma, and can be fatal if left untreated.
African sleeping sickness
is believed to have resulted from a
secondary endosymbiotic event
chromalveolates
include very important photosynthetic organisms, such as
diatoms, brown algae, and significant disease agents in animals and plants.
Chromalveolates
are derived from a common ancestor that engulfed a photosynthetic red algal cell, which itself had already evolved chloroplasts from an endosymbiotic relationship with a photosynthetic prokaryote.
chromalveolates
considered as the main
causative organism of
Paralytic Shellfish
Poisoning (PSP) in the
Philippines
Pyrodinium bahamense var. compressum
are unicellular photosynthetic
protists that encase themselves in intricately
patterned, glassy cell walls composed of
silicon dioxide
diatoms
These protists are a component of
freshwater and marine plankton.
diatoms
all apicomplexans are
parasitic
all —— are parasitic
Apicomplexians
which causes malaria in humans.
Plasmodium
must colonize
both a mosquito and a vertebrate to complete
their life cycle.
Plasmodium
where do Plasmodium develop in humans
liver cells
what type of cells do Plasmodium infect
red blood cells
it accounts for 50 percent of all malaria cases and is the primary cause of disease-related fatalities in tropical reggions of the world
Plasmodium falciparum
what is the locomotion of Paramecium
Cilia
are unicellular heterotrophic protists, ranging from approximately 20 micrometers to several centimeters in length
Foraminiferans, or forams
occasionally
resembling tiny snails
Foraminiferans or forams
exhibit intricate exteriors of glassy silica with radial or bilateral symmetry.
radiolarians
has Needle- like pseudopods supported by microtubules radiate outward from the cell bodies of these protists and function to catch food particles.
Radiolarians
most abundant group of
algae
green algae
exhibit similar features to the land plants, particularly in terms of chloroplast structure
green algae
are the closest living relatives to land plants and resemble them in morphology and reproductive strategies
charophytes
Volvox aureus is a green alga in the supergroup
Archaeplastida
is a green alga in the supergroup Archaeplastida
Volvox aureus
consists of cells immersed in a gel-like matrix and intertwined with each other via hair-like cytoplasmic extensions
Volvox aureus
are represented among the chlorophytes.
Ulva
exhibit
pseudopodia
that extend
like tubes or
flat lobes
amoebozoans
