The primary energy source for termites comes from
A) acetogenic Archaea.
B) acetogenic Bacteria.
C) methanogenic Archaea.
D) methanogenic Bacteria.
Answer: B
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The most severe illness associated with leptospirae, with symptoms of liver, kidney, and/or vascular dysfunction with lethal pulmonary hemorrhage and sometimes death, is called:
a. icteric leptospirosis. b. anicteric leptospirosis. c. Vincent's disease. d. syphilis.
A diploid cell only has two copies of most genes, but can make hundreds of copies of a protein from those genes per second because
A. the DNA can replicate during transcription, producing double-sided mRNA to accelerate the translation process. B. transcription can repeat and make multiple mRNA copies of genes, and multiple ribosomes can translate the same mRNA. C. multiple ribosomes can actively attach to the template DNA and conduct translation immediately after transcription. D. multiple copies of the same mRNA can be produced with multiple promoter sequences to simultaneously initiate multiple ribosomes. E. multiple codons can encode for the same amino acid, allowing different versions of the protein to be made.
Which of the following statements about the development of bone in humans is NOT true?
A. Bone breakdown and replacement occur throughout life. B. A primary ossification center forms in the middle of a long bone. C. A secondary ossification center forms at the end of a long bone. D. A cartilaginous disk remains between the primary and secondary ossification centers until old age. E. Bones may form within a cartilage model or within a membrane matrix.
While on a backpacking trip in Maine, Julie and her friends obtained their drinking water from several different pristine streams, adding one or two drops of bleach to ensure its safety. Several days later Julie began experiencing abdominal distress, specifically cramping, fatty diarrhea, and flatulence. When it didn't clear up within several days, Julie visited her doctor. Which of the following would be the most likely cause of Julie's symptoms?
A) E. coli O157:H7 B) Giardia intestinalis C) Entamoeba histolytica D) Schistosoma mansoni E) Toxoplasma gondii