The group of protistan aquatic organisms known generally as ________ produces most of the world's oxygen
Fill in the blank(s) with correct word
phytoplankton
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Which genus produces hyaluronidase?
A) Mycobacteria B) Streptococcus C) Shigella D) Procholorococcus
People do not develop a secondary immune response to influenza because
A) the immune system mutates from season to season. B) secondary immune responses are only possible against bacteria. C) the primary immune response is sufficient to protect against flu. D) the causative viruses mutate each season.
Which of the following statements is true?
a. There is no danger involved in recombinant DNA research in humans. b. There is no danger involved in recombinant DNA research in bacteria. c. There is no danger in releasing recombinant organisms into the environment. d. Stringent safety rules make the use of recombinant DNA research possible. e. It is safe to conduct recombinant DNA research in plants.
Cladograms are especially useful because they can indicate both the order and the timing of evolutionary events.
a. true b. false