A new serotype of Vibrio cholerae, V. cholerae 0139, has picked up the ability to produce
A. pili.
B. flagella.
C. capsules.
D. toxin.
C
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At 4:00 p.m. a closed flask of sterile broth is inoculated with 10,000 cells. The lag phase lasts 1 hour. At 9:00 p.m. the log phase culture has population of 65 million cells. The approximate number of generations that has occurred is
A. 27. B. 13. C. 21. D. 5.
Which of the following terms is used by ecologists to describe the community interaction where one organism makes the environment more suitable for another organism?
A) parasitism B) mutualism C) inhibition D) facilitation E) commensalism
AUGCGUCCA
The sequence of amino acids specified by this mRNA is a. serine – histidine – lysine. b. methionine – arginine – proline. c. methionine – alanine – serine. d. valine – arginine – leucine. e. none of these.
Molecular techniques led to the reinterpretation of morphologically based phylogeny such that
A. echinoderms and chordates were placed in entirely different clades. B. rotifers and nematodes were designated as closely related. C. annelids and arthropods were designated as closely related. D. Bilateria was designated as a monophyletic group. E. Ecdysozoa and Lophotrochozoa were designated as clades.