OPENSTAX MICROBIOLOGY 2026
CERTIFICATION EVALUATION TEST PAPER
QUESTIONS SOLUTIONS GRADED A PLUS
◉ protist.
Answer: protozoa
algae
water molds
plankton: photosynthetic
zooplankton= motile and non-photosynthetic
◉ Unicellular eukaryotic organisms.
Answer: Giardia lamblia (diarrheal -Beaver fever), Trichomonas
(trichomoniasis), Plasmodium falciparum (malaria) b) Examples -
Plankton -zooplankton vs phytoplankton
◉ Parasitic Helminths.
Answer: Examples -Flukes, tapeworms
◉ fungus.
Answer: Examples -Aspergillus, Candida albicans, Histoplasma
capsulatum
,◉ Algae.
Answer: Photosynthetic, single or multicellulara)Examples -
Dinoflagellates, diatoms
◉ lichen.
Answer: a simple slow-growing plant that typically forms a low
crusty, leaflike, or branching growth on rocks, walls, and trees
◉ malaria.
Answer: is a disease caused by Plasmodium falciparum transmitted
to humans by mosquitos
◉ Unicellular Eukaryotic Parasites.
Answer: are nonphotosynthetic, motile organisms that are always
unicellular
◉ protists life cycle.
Answer: Free-living or parasitic (life cycle in host)
Trophozoites (feeding and growth stage) vs cyst(inactive form with
protective wall, forms via encystment)
◉ protists reproduction.
, Answer: Asexual: Binary fission (identical copy of cell), budding(a
portion of the cell breaks off and forms a new cell),
schizogony(nucleus divides many times in one cell) forming
merozoiteswhich are stored in schizonts
Sexual: Production of haploid gametes that fuse (syngamy) or
joining to exchange of DNA (conjugation)
◉ protists morphology.
Answer: Plasmalemma-Plasma membraneuOptional: Pellicle,
ectoplasm/endoplasm
◉ protists feeding.
Answer: Heterotrophic, some are saprozoic(absorbs simple organic
molecules)
◉ protists locomotion.
Answer: Flagella, cilia, or pseudopodia
◉ Giardia lamblia.
Answer: >causes beaver fever
In the United States, Giardiais the most common human intestinal
parasite, causes severe diarrhea
◉ Trophozoite.
CERTIFICATION EVALUATION TEST PAPER
QUESTIONS SOLUTIONS GRADED A PLUS
◉ protist.
Answer: protozoa
algae
water molds
plankton: photosynthetic
zooplankton= motile and non-photosynthetic
◉ Unicellular eukaryotic organisms.
Answer: Giardia lamblia (diarrheal -Beaver fever), Trichomonas
(trichomoniasis), Plasmodium falciparum (malaria) b) Examples -
Plankton -zooplankton vs phytoplankton
◉ Parasitic Helminths.
Answer: Examples -Flukes, tapeworms
◉ fungus.
Answer: Examples -Aspergillus, Candida albicans, Histoplasma
capsulatum
,◉ Algae.
Answer: Photosynthetic, single or multicellulara)Examples -
Dinoflagellates, diatoms
◉ lichen.
Answer: a simple slow-growing plant that typically forms a low
crusty, leaflike, or branching growth on rocks, walls, and trees
◉ malaria.
Answer: is a disease caused by Plasmodium falciparum transmitted
to humans by mosquitos
◉ Unicellular Eukaryotic Parasites.
Answer: are nonphotosynthetic, motile organisms that are always
unicellular
◉ protists life cycle.
Answer: Free-living or parasitic (life cycle in host)
Trophozoites (feeding and growth stage) vs cyst(inactive form with
protective wall, forms via encystment)
◉ protists reproduction.
, Answer: Asexual: Binary fission (identical copy of cell), budding(a
portion of the cell breaks off and forms a new cell),
schizogony(nucleus divides many times in one cell) forming
merozoiteswhich are stored in schizonts
Sexual: Production of haploid gametes that fuse (syngamy) or
joining to exchange of DNA (conjugation)
◉ protists morphology.
Answer: Plasmalemma-Plasma membraneuOptional: Pellicle,
ectoplasm/endoplasm
◉ protists feeding.
Answer: Heterotrophic, some are saprozoic(absorbs simple organic
molecules)
◉ protists locomotion.
Answer: Flagella, cilia, or pseudopodia
◉ Giardia lamblia.
Answer: >causes beaver fever
In the United States, Giardiais the most common human intestinal
parasite, causes severe diarrhea
◉ Trophozoite.
