A chemoorganotroph growing optimally at 55 °C and pH 2 in complex media would most likely be a member of the genus
A) Methanocaldococcus.
B) Halobacterium.
C) Methanococcus.
D) Thermoplasma.
Answer: D
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Horizontal gene transfer is not thought to play a major role in the exchange of which of the following genes between bacterial species?
A. genes encoding rRNAs B. genes conveying antibiotic resistance C. genes involved in nitrogen fixation D. genes involved in bacterial photosynthesis
Biologists have recently been interested in Miss Waldron's red colobus monkey (Procolobus badius) because it is ____
a. increasing in numbers b. a pest to farmers c. thought to be extinct d. capable of carrying HIV e. capable of carrying the Ebola virus
Veins carry ________.
A. blood high in carbon dioxide B. blood low in oxygen and high in carbon dioxide C. blood high in oxygen D. blood low in oxygen
A DNA molecule is made up of:
a. lipids b. proteins c. nucleotides d. fatty acids e. carbohydrates