Which cell can transfer the most DNA?
A. B cell
B. R cell
C. F+ cell
D. F- cell
E. Hfr cell
Answer: E
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What is not a main factor of change to bathygraphic features in the ocean?
a. Subsidence b. Erosion c. Sedimentation d. Uplift
What evidence exists that suggests modern agriculture is unsustainable?
A) Fresh water is used for irrigating crops. B) Large amounts of nonrenewable fossil fuels are required. C) Fertilizers and pesticides are inexpensive and easy to obtain. D) More food is produced than can be used.
A child with no known congenital problems is diagnosed with inflammation of the heart valves. The medical history of the child is unremarkable except for a sore throat and fever six weeks prior, which the parents attributed to a common cold. The heart
valve inflammation is most likely due to A) atypical pneumonia. B) tuberculosis. C) Corynebacterium diphtheriae. D) Bordetella pertussis. E) autoimmune complications of Streptococcus pyogenes.
Koch used ________ to culture bacterial cells in his laboratory
a. agar b. gelatin c. potatoes d. agar, gelatin, and potatoes