In the CAMP test a single streak of a beta-hemolytic streptococcus is placed perpendicular to a streak of beta-lysin-producing Staphylococcus aureus. After incubation a zone of increased lysis in the shape of an arrowhead is noted, which indicates the presumptive identification of ______________.
A. Streptococcus equines
B. Streptococcus pyogenes
C. Streptococcus bovis
D. Streptococcus aggalactiae
Answer: D. Streptococcus aggalactiae
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Angiosperms possess many adaptations. Which of the following statements is not true of angiosperms relative to other groups of plants?
A. Angiosperms have xylem vessels. B. Angiosperms rely entirely on tracheid xylem. C. Angiosperms have much higher rates of CO2 uptake than other groups of plants. D. Angiosperms transformed the terrestrial environment due to their metabolic activities. E. Angiosperms can support greater rates of photosynthesis and transpiration than other groups of plants.
As producers, what inputs do plants require for the process of photosynthesis?
a. oxygen and sunlight b. oxygen and carbon dioxide c. carbon dioxide and sunlight d. carbon dioxide, oxygen, and sunlight
Four of the five tissues listed below are found in a
cross-section of a eudicot root. Select the exception. a. cortex b. pith c. pericycle d. endodermis e. epidermis
A ________ is used in industrial microbiology to produce microbial products that are only synthesized during log phase growth.
A. Coulter counter B. broth culture C. spectrophotometer D. pour plate E. chemostat