Mutation of the fru (fruitless) gene in fruit flies results in males attempting to mate with other males. This is an example of
A. imprinting.
B. learned behavior.
C. fixed action pattern.
D. reflex.
E. taxis.
C. fixed action pattern.
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Nonfermenting gram-negative rods isolated from respiratory samples from cystic fibrosis patients are difficult to identify using commercial systems. Thus, other testing platforms are being used to aid in accurate species identification. Which of the following systems has the advantage of a large curated database of proteomic profiles representative of many microorganisms and can give definitive
organism identification within minutes? a. Cellular fatty acid analysis b. MALDI-TOF mass spectrometry c. Multilocus sequence typing d. Ribotyping of 16S rRNA gene
The products of the Krebs cycle include
A) ATP only. B) carbon dioxide and energy carriers only. C) carbon dioxide only. D) energy carriers only. E) ATP, carbon dioxide, and energy carriers.
You have a small tree in your yard that is the height that you want it, but does not have as many branches as you want. How can you prune it to trigger it to increase the number of branches?
A) Cut off the leaves at the ends of several branches. B) Cut off the tips of the main shoots. C) Cut off lower branches. D) Cut off the leaves at the base of most of the branches.
The bones and cartilage in animals serve the same function as ________ in plants.
A. wood B. leaves C. phloem D. xylem E. capillaries