Share
Explore BrainMass

Biology review

Please review the 5 questions for correctness. There were a couple that I was unable to answer.

5. Cyst formation by certain protozoa permits
a. Survival in the arthropod vector.
b. Enhanced reproduction by the protozoan.
c. Passage through the stomach acid.
d. Using carbon dioxide as an energy source.

16. An amoeba produces a disease of the intestines that begins with watery stools but, if left untreated, will cause bloody stools to develop as digestion of the tissue by the organism reaches the underlying blood vessels. This disease is
a. PAM
b. Giardiasis
c. Amoebiasis
d. African Trypanosomiasis

29. The treatment of multicellular parasites generally consists of
a. Penicillin therapy
b. Large doses of sulfonamide drugs
c. Reducing worm burden.
d. Treatment with antimony compounds.

39. The life cycle is the least complicated for which one of the following parasites.
a. The pinworm Enterobius vermicularis
b. The fluke Schistosoma mansoni
c. The tapeworm Taenia solium
d. The liver fluke Fasiola hepatica

44. Hardened shells that form around the larvae of many roundworms and flatworms are called
a. Copepods
b. Scolexes
c. Proglottids
d. Cysts

See attached file for full problem description.

Attachments

Solution Preview

5. Cyst formation by certain protozoa permits
a. Survival in the arthropod vector.
b. Enhanced reproduction by the protozoan.
c. Passage through the stomach acid.
d. Using carbon dioxide as an energy source.

Explanation: A cyst is a protective for that is often used to survive harsh environments like the stomach.
"A cyst may also be a sack that encloses an organism during a dormant period, such as in the case of certain parasites. This type of cyst may, for instance, protect a parasite from the churning acid of the stomach so it may pass through to the intestines unharmed where it can then break out." http://en.wikipedia.org/wiki/Cyst

16. An amoeba produces a disease of the intestines that begins with watery ...

Solution Summary

Answers and explanation to several multiple choice questions.

$2.19