Whooping cough is caused by ________.
A. Yersinia pestis
B. Klebsiella pneumoniae
C. Vibrio parahaemolyticus
D. Bordetella pertussis
Answer: D
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Refer to the paragraph on the Venter et al. paper and the table above. How do you think expected genes were placed into the categories shown in the preceding table?
A) by searching for open reading frames (ORFs), especially those with translation start and stop sites B) by searching for matches, especially of the predicted gene products, with previously identified gene products of known function C) by expressing the cloned genes in E. coli and then running biochemical analyses of the products D) by searching for similarity between ORFs and those in existing databases
A deaf whale lacks the ability to perceive its environment through echolocation
Indicate whether the statement is true or false.
Which of the following processes does NOT
serve to maintain low pressure at the receiving end of sieve tube pipelines? a. sucrose conversion into cell-wall polysaccharides b. sucrose conversion into starch in the receiving regions c. sucrose conversion to glucose, which is then used in cellular respiration d. activity of companion cells e. conversion of sucrose to fructose in fruits
Cyanobacteria are prokaryotes that carry out oxygenic photosynthesis like green plants; this means that ________.
A. they have two distinct photosystems B. they produce oxygen as a by-product of photosynthesis C. they use water as their electron source D. All of the choices are correct.