Pseudomonas aeruginosa is a common pathogen that infects the airways of patients with cystic fibrosis. It does not grow in the absence of oxygen. The bacterium is probably which of the following?
A. an aerotolerant anaerobe
B. an obligate aerobe
C. an obligate anaerobe
D. a facultative anaerobe
Ans: B. an obligate aerobe
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Cactus leaves are modified as trichomes
Indicate whether the statement is true or false.
The spread of cancer cells from one site to
others in the body is known as
a. abiogenesis. b. metastasis. c. benign transfer. d. neoplastic movement. e. mutational slippage
Which of the following microbes are most commonly the causative agent in healthcare-associated infections?
a. Hepatitis B viruses b. Gram-negative intestinal biota c. Acid-fast mycobacterium d. Gram-positive cocci
Molluscs share a three-part body plan consisting of
A. eyespots, a digestive system, and a nervous system. B. a corona, stomach, and intestines. C. a scolex, proglottids, and an anus. D. a visceral mass, mantle, and foot.