Question 1

Discuss the significance of members of the order Trichomonadida,which possess hydrogenosomes (organelles analogous to mitochondria but which produce molecular hydrogen when oxygen is absent).

Accepted Answer

The answer of Discuss the significance of members of the...

Question 2

The protozoan group that contains only endoparasitic forms is the ____________________.

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The answer of The protozoan group that contains only endoparasitic...

Question 3

Cilia or flagella are resorbed and the Golgi apparatus secretes wall material during

Accepted Answer

A) formation of a contractile vacuole. 
B) intermediary meiosis. 
C) conjugation. 
D) pseudopod streaming. 
E) encystment.

Question 4

Some organisms undergo meiosis to produce gametes that fuse to form a zygote internally without leaving the organism.What is the effect of this process on genetic diversity of the offspring?

Accepted Answer

A) The offspring would be identical clones of the parent. 
B) The offspring could vary from the parent but there would be less genetic variation because this is inbreeding. 
C) The offspring would vary from the parent because it would produce different recombinations of each chromosome pair. 
D) The offspring would become more and more genetically diverse each generation. 
E) None of the choices is correct.

Question 5

Most ciliophoran protozoa

Accepted Answer

A) possess flagella. 
B) possess a cytostome. 
C) are marine. 
D) are parasitic. 
E) have cyst stages for surviving harsh conditions.

Question 6

Foraminiferans are protozoans that form complex,many-chambered tests composed of _____________.

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The answer of Foraminiferans are protozoans that form complex,many-chambered tests...

Question 7

Mosquitoes that transmit malaria pick up what stage(s)when feeding on the blood of a patient ill with malaria?

Accepted Answer

A) microgametocytes and macrogametocytes that mature into gametes in the insect host 
B) sporozoites from the oocysts 
C) merozoites that escape from the red blood cells 
D) hemozoin stored in red blood cells 
E) trophozoites in red blood cells

Question 8

Which of the following is/are correct descriptions of unicellular eukaryote characteristics?

Accepted Answer

A) As primitive organisms,they are restricted to asexual reproduction. 
B) No germ layers are ever formed. 
C) They are all aquatic. 
D) When found in other organisms,they are typically parasitic or pathogenic. 
E) They all lack symmetry.

Question 9

Which protozoan is used to test hypotheses of how multicellular organisms arose from their closest unicellular relatives?

Accepted Answer

A) microsporidians 
B) choanoflagellates 
C) opalinids 
D) retortamonads 
E) kinetoplastans

Question 10

Usually we expect fission to produce two cells from one,but in Sporozoea and some Sarcodina,multiple fission of the nucleus is followed by rapid division of cytoplasm,releasing many new individuals immediately in a process called

Accepted Answer

A) amitosis. 
B) budding. 
C) syngamy. 
D) autogamy. 
E) sporogony.

Question 11

A protozoan with both plant-like photosynthesis and animal-like motility is most likely a

Accepted Answer

A) sporozoan. 
B) dinoflagellate. 
C) euglenoid. 
D) zooflagellate. 
E) ciliate.

Exam 11: Unicellular Eukaryotes