Even after a positive test for a microbial cause, chronic prostatitis is unresponsive to antibiotic therapy. Why might this be the case?
A. Mixed species biofilms are hard to eliminate with antibiotics.
B. The infection is sporadic.
C. It is a viral infection.
D. The side effects of the drug are too great.
Answer: A
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Because birds such as the black widowbird eat fruit and insects, they are considered to be
__________.
a. autotrophs b. heterotrophs c. producers d. decomposers
In many eudicots, the primary root that enlarges and persists throughout the life of the plant is a
A. stolon. B. rhizome. C. taproot. D. companion root. E. fibrous root.
What is the effect of a beta-barrel on the permeability of a membrane?
a. It decreases permeability. b. It increases permeability. c. It has no effect. d. beta-barrels are never found in membranes.
The Galapagos archipelago appeared about 2 million years ago, when submerged volcanoes (seamounts) rose above the ocean's surface. A single hypothetical colonization event introduced a species of finch to one island in the distant past. Today, several islands in the archipelago contain unique species of finches. What must have happened following the initial colonization event to account for the current situation?
1. cladogenesis 2. anagenesis 3. allopatric speciation 4. adaptive radiation A) 1 and 3 B) 1 and 4 C) 2 and 3 D) 1, 3, and 4 E) 2, 3, and 4