Esophageal varices are a direct result of:
A) esophageal erosion.
B) alcohol consumption.
C) portal hypertension.
D) cirrhosis of the liver.
Answer: C) portal hypertension.
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A defining characteristic of eukaryotic organisms is that they
A. have their transcription occurring in the cytoplasm and translation in the nucleus. B. have their transcription occurring in the nucleus and translation in the cytoplasm. C. have only operons to assist in gene expression. D. carry out protein synthesis only in the presence of the cAMP molecule. E. use the leucine zipper primarily for the production of the amino acid tryptophan.
Some bacteria have a spherical shape, called ________.
A. coccus B. spirillum C. bacillus D. spheroid
The living portion of the pathway through which water travels through a root is called the symplastic
pathway.
Indicate whether the statement is true or false.In _______ mimicry, unprotected species resemble others that are distasteful.
A. Müllerian B. competitive C. Batesian D. aposematic