Which one of the following bacteria does NOT belong with the others?
A) Bacillus
B) Escherichia
C) Lactobacillus
D) Staphylococcus
E) Streptococcus
B
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A microbiologist is working with a bacteria strain to determine if cells are competent. Cells are grown under optimal conditions with DNA fragments that carry two genes, green fluorescent protein and ampicillin resistance, and then plated to nutrient agar with and without ampicillin. Following incubation, plates are examined for fluorescent colonies under a UV lamp. Predict the results if cells are competent.
A. Colonies will be present on both types of plates, but will only fluoresce on the ampicillin agar plates. B. Fluorescent colonies will be present on the the ampicillin agar plates, but there will be no growth on the nutrient agar plates. C. Fluorescent colonies will be present on both types of plates. D. There will be no growth on either type of plate.
The ability to alter the connections between neurons is known as:
A. long-term memory. B. synaptic plasticity. C. long-term potentiation. D. All of the answer options are correct.
What is an exception to the standard biological species concept used to define a species?
A) Species that coevolved cannot be distinguished using this concept. B) Natural interbreeding populations cannot be distinguished using this concept. C) Asexual species cannot be distinguished using this concept. D) Species that do not resemble one another cannot be distinguished using this concept.
Ergot poisoning is caused by
a) Giardia intestinalis. b) Claviceps purpurea. c) Aspergillus flavus. d) Entamoeba histolytica.