Primates, as well as dogs, sheep, and horses, have died of central nervous system (CNS) infections with which organism?
a. N. fowleri
b. Acanthamoeba spp.
c. Toxoplasma gondii
d. Balamuthia mandrillaris
D
B. mandrillaris is uncommon and was thought to be a harmless soil organism, with no relevance for infecting mammals. However, since B. mandrillaris was first recognized at the San Diego Wild Animal Park when a gibbon died of meningoencephalitis, a number of primates, as well as dogs, sheep, and horses, have died of CNS infection caused by this organism. Approximately 100 cases of human amebic encephalitis worldwide have been identified with approximately one-half of the cases diagnosed in the United States. Death can occur from a week to several months after the onset of symptoms. Patients eventually die with a massive CNS infection.
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Fermentation can be performed only by bacteria and not by archaeons
A. true B. false
Which of the following organisms do not demonstrate a definitive alteration of generations in their life cycles?
A. mosses B. angiosperms C. ferns D. gymnosperms E. green algae
Many scientists and drug companies have worked hard to produce drugs to stop various stages of the HIV life cycle. Some drugs have been tested that inhibit the function of Vpu. What stage of the HIV life cycle would such a drug inhibit?
A. Synthesis of double stranded DNA B. Virus assembly C. Virus budding D. Integration into the host chromosome
Why would migration to an island by a single pair of birds be likely to lead to adaptive radiation in their descendants?
What will be an ideal response?