Chapter 11: Exam Prep Flashcards
(24 cards)
The most correct usage of the term “protozoa” is a(n)
informational cluster of groups with complicated and uncertain phyletic relationships
Which of the following is/are correct descriptions of unicellular eukaryote characteristics?
No germ layers found
Which organelle was once an independent aerobic prokaryotes engulfed by an anaerobic prokaryote?
Mitochondrion
Which unicellular eukaryote is NOT correctly linked to the type of movement structure it possesses?
Apicomplexa-reticulopida
Which of the following represents the arrangement of microtubules in aconemes of cilia?
nine peripheral pairs of microtubules plus one central pair
What is the function of the contractile vacuole in Protozoa?
Water balance
The most likely mechanism for removing excess water by contractile vacuoles is
A proton pump that also pulls water into the vacuole
The distinction between phagotrophs (or holozoic feeders) and osmotrophs (or saprozoic feeders) is a difference between
Ingesting visible particles or organisms versus ingesting dissolved substances, sometimes from dead organisms
What is the name of the mouth structure found at the end of the oral groove in a Paramecium ciliate?
Cytostome
What is the specific structure in ciliates that serves as the site of expulsion for wastes called?
Cytoproct
Protist reproduction
Nah be asexual or any of the above sexual cycles
When a protozoan alternates between haploid and diploid generations, as occurs in most plants, is called
Intermediary meiosis
When the haploid cells or pronuclei are borne in equal-sized cells that look alike, they are called
Isogametes
What happens during conjugation in most ciliates?
Haploid micronuclei are exchanged
Protective cysts are triggered by
All the choices are correct
(Drying out, decreased oxygen, Neely being the next stage in a regular life cycle)
A protozoan with both plant like photosynthesis and animal like motility is most likely an
Euglenoid
“Red tides” are caused by massive blooms of
Protozoans in the genus Trypanosoma cause
African sleeping sickness and Chagas’ disease
Giardia lamblia cause
Dysentery and intestinal ailments; is found in contaminated water
Chalky fossils that formed the White Cliffs of Dover were produced by
foraminiferans
Perhaps half of the U.S population is infected with this organism that normally resides in tissue cysts containing bradyozoites: embryos of pregnant women are also at risk
Toxoplasma gondii
The various species of Plasmodium vary in
All the choices are variables in Plasmodium
(mortality, or risk of death, to human host, the intensity of their physical symptoms, their incubation period, the number of times they initiate schizogony in liver cells
The ciliate group of protists would include
Paramecium caudatum
The structure in a Euglena that functions to orient it to the light is the or eyespot
Stigma
