Although Deinococcus-Thermus phyla stain Gram-positive, which reason(s) exclude them from this Gram type?
A. Their cell envelope includes an S-layer
B. They have L-ornithine in their peptidoglycan
C. Their plasma membrane has phosphatidylglycerol phospholipids instead of palmitoleic acids
D. They lack teichoic acids
Answer: D
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The Northeast trade winds occur
A) between the equator and the north pole. B) between the equator and 30° N. C) between 10° N and 45° N. D) all along the Atlantic Ocean.
If the plants in a community produce 500 grams of organic matter per square meter per year that is available for animals in the community to eat, this amount of energy is known as the
A) availability factor of the community. B) trophic factor of the community. C) net primary productivity of the community. D) consumership of the community. E) secondary productivity of the community.
A young man returned from a backpacking trip in Mexico suffering from a high fever, pain in the abdomen, and watery diarrhea. The emergency room doctor noted a faint rash on the patient's abdomen andchest. A blood specimen was collected and plated onMacConkey agar, incubated at 37°C in ambient air. Lactose-negative colonies grew on the plates. The cultured organism was a Gram-negative rod that did not produce Shiga or Shiga-like toxins. The most likely etiologicalagent for this man's disease is:
A. Vibrio parahaemolyticus B. Salmonella typhi C. Shigella dysenteriae D. Enterohemorrhagic Escherichia coli
The Gram stain is not suitable for identifying members of the Archaea
Indicate whether the statement is true or false